Needless to say, the grievances between the island country and China in the later generations, Liu Yi's previous life Su Qingcheng came to this world for the sake of an island dispute, and he was born in Jinling City, so he has a natural hostility to the island country. Today, I just want to leave some mark, and it's hard to be alone and not be able to share secrets.

But it's different for the women, this is still the husband's head to send their maids, anything is always very attractive to put the first barcode, and there are such novel names, although those maids don't understand Chinese, they are still young, so good** is, anyway, as long as Liu Yi is interested, they are willing to accept it, but I don't know why he is so familiar with these names.

"It's still early today, so let's go to the study with my husband first." After arranging the assignment of Maria Ozawa, Lea Sakurai, Kaede Matsushima and others, Liu Yi said to the women, seeing that her husband was in a good mood today, and he knew that going to the study must be something important, how could he not go happily.

The women in Liu Yi's study are more familiar, the most of them are books, of course, and they are mainly based on military books and war strategies, but the appearance of the same thing today surprised them, the front wall of the west was hung by the husband on a black wooden board that is two feet long and nearly one high, this thing they have seen, it was Feng Ruoxi in the courtyard two days ago for the husband to polish and color, yesterday was also in her courtyard, I didn't expect to arrive at the husband's study today, and after seeing Liu Yi enter the door, he moved a few chairs in front of the blackboard in a row, I couldn't help but be even more curious, looking at each other, but obviously no one knew what the husband was going to do, and the sense of anticipation was even greater.

"Everyone, please sit down, today for the husband to invite you to come to tell you something new, if you can, everyone can help the husband, don't be in a hurry to ask, bring back who wants to speak, please raise your hand first, and wait for the husband to ask, don't discuss in private!" Liu Yi said with a straight face, what he did today has the meaning of joking with the women, but the real scheming has already been there, as a traverser, now he is little by little he is passing on what he knows in later generations to this world in order to help his great cause, the reason why he is so cautious is because there is no intellectual property rights in this era, and his own things will soon be imitated by others, and it is impossible to say that he will be better than his own use, but now his status is different, and his strength is also the crown of the Han Dynasty. This step can be taken a little bigger, and these wives and concubines in the family are the people he trusts the most.

It should be said that trust is only a prerequisite, the important thing is that his wives and concubines are not only stunning in the world, they all have their own strengths and ideas, and Liu Yi is the person who will not despise women in the world, and he has moved from the army to his home by brainstorming, and the meaning of the women is very representative of the vision of the vast majority of people today, and it can also give him a good reference!

"Husband, do you want to follow the example of Mr. Youzhou Academy to teach us?" However, it seems that Comrade Yan Wang's words are not too effective at home, Zhen Mi has already asked questions before he raised his hand, and the curiosity in their hearts is even stronger after listening to her husband's words, although she has been with her husband for many years, but Liu Yi's endless fresh theories seem to be endless. Zhen Mi's question represents everyone's thoughts, and all eyes are focused on him.

"Mi'er, you are really smart and you guess it, but only for the husband to speak first, ask a question here to raise your hand first, and only ask after the husband agrees, only this once, not an example, now we officially start." Liu Yi first praised his concubine, and then said a serious word, but Zhen Mi glanced at her husband before sitting back down.

At this time, Liu Yi took out a bamboo pen on the horizontal frame under the blackboard, which is very different from the usual use, the center is a long strip of charcoal, tightly wrapped in a bamboo tube, specially designed for writing on the blackboard, needless to say that this is from the hand of Feng Ruoxi. Today's husband is very different, the curiosity in the hearts of the women makes them concentrate on following the husband's bamboo pen movement, only to see that he now writes one to nine nine numbers on the blackboard, but in the corresponding position under it is written a few symbols that the women have never seen, and there is a circle in which there is a single column.

When Liu Yi finished writing and turned around, a piece of jade arm in front of him was raised, quite dazzling, looking at the expressions of the women, he knew that they were very interested in what he wrote, and couldn't help but smile slightly: "Zhen'er said first, what do you think about what you write for your husband?" ”

Mi Zhen's sweet smile immediately showed on her face when she heard this, but the women who were not named by her husband were a little lost, but then became serious: "What the husband wrote is the nine numbers from one to nine, are these strokes below corresponding to it?" What does that circle mean?

"Well, that's a great idea, and the meaning is right, but it's not a stroke, it's also a number, but they're called Arabic numerals, and that circle is unique to their numbers, and it has a great effect, it can be called a great invention, don't be in a hurry to ask, I'll give you a detailed explanation of this matter later, Mi'er, you are the most proficient in arithmetic, and your husband asks you, how much is three hundred and eighty-nine times four hundred and sixty-seven?" Liu Yi nodded slightly in approval, and then said that after the application in the field of military governance, his entry point was chosen in culture, of course, the number is closely inseparable, the previous paper is a precedent, but at this time it is called "Liu Lang paper", and the implementation in Youzhou Academy has been greatly praised, and it is called a grand event!

Hearing the words of Arabic numerals, all the women raised their hands more enthusiastically, even Cai Yan is no exception, the deeper the knowledge, the stronger the desire for knowledge, and what the husband said is really unheard of, but Liu Yi pressed down with his hands at this time to temporarily stop the women from asking, but asked Zhen Mi.

"Eighty one million six hundred sixty-three!" The multiplication of these three-digit numbers is extremely difficult to calculate by heart, but who is Zhen Mi? The eldest lady's arithmetic can be described as exquisite, when she was courting Gan Ning that day, her hand-held "butterfly double flying" arithmetic use made countless old accounts room are eye-opening, this mental arithmetic is also her strength, Liu Yi's question has just been exported but a few breaths, she has already had a result, it is really a god, all the women can't help but cast envious eyes, even Liu Yi is no exception, Zhen Mi at this time smiled slightly, but it was natural to look at her husband proudly.

"Fang Cai Zhen'er said, these Arabic numerals written for the husband are the correspondence of my numbers, and its effect will be clear later, Mi'er, you come up and write the entire algorithm on the board, and write it with Arabic numerals for the husband, faster than who!" Liu Yi first said to the women seriously, and then looked at Zhen Mi, with a hint of provocation in it.

"It's better than that, people aren't afraid of you." This algorithm is Zhen Mi's director, how can he be afraid, and then quickly stepped forward to take the bamboo pen from Liu Yi's hand and wrote on the blackboard, although it was the first time to write with this object, but Zhen Mi was so smart, the state of flowing water was much stronger than Liu Yi, and at this time Liu Yi just smiled slightly, and waited for the concubine to write for a while before starting to write.

This result is self-evident, Huaxia's arithmetic is indeed broad and profound, at this time it is far ahead of the world level, but it is extremely complicated to use in writing, far less fast than Arabic numerals, even Zhen Mi wrote like a fly, but before she was halfway through writing, she saw her husband smile at her, and at this time, there was a whole piece of operation under Liu Yi's pen that was unprecedented.

"Arabic numerals are different from our dynasty, its ten hundred thousand do not need to be written directly, but through the superposition of the basic numbers, you see, two digits are ten, three digits are hundreds, four digits are thousands, and so on, remember the correspondence that the husband just said? Yan'er, you come to recite the result of this Arabic numeral. Liu Yi explained to everyone in detail and then said to Cai Yan that he believed that after such an explanation, his beloved wife would be able to find some of the rules.

"Four is thousand, five is 10,000, and six is 100,000, and according to the correspondence that the husband just said, it should be 181,663, which is the same as what Sister Mi gets, but the husband's algorithm seems to be faster." Cai Yan got up and groaned a little when she heard this, and then said slowly, according to her husband's prompt, she quickly found the law and read out Liu Yi's results. Then he said with a slight shock, obviously somewhat unexpected about this result.

"Husband, Mi'er has already said the answer, and Husband seems to be a bit tricky like this!" Zhen Mi on the side was quite unconvinced when she heard this, and it was such a strange way to be compared to others in her own field of expertise, even that person Liu Yi made her feel resentful.

"It's okay, let's talk a little more for the husband, in the future, everyone here has something to say, but it doesn't matter, don't have any worries, Mi'er knows what her husband knows, so I'll show it to you again, Yu'er, come here!" After Zhen Mi spoke, she suddenly felt that something was wrong, how could she say this about her husband in front of her sisters? was about to apologize but was stopped by Liu Yi first, and then called Yu'er up after speaking, although his wives and concubines were of different origins, almost every woman had extraordinary knowledge, but only Yu'er was an exception, it was really congenital, what her husband said she was also very interested in like her sisters, but it was difficult to understand, it can be said that the most lost thing in the field at this time was Yu'er, this situation fell in Liu Yi's eyes and couldn't help but feel a pain in his heart, and hurriedly spoke softly.

Seeing her husband calling herself, Yu'er's expression softened slightly, and she immediately walked in front of Liu Yi. "Yu'er, later, you can just say the last multiplication, and I will calculate it with Mi'er, but Mi'er, you must use a pen to calculate, otherwise your mental arithmetic method is not to mention using Arabic numerals, even the number of Ah Shentian is not yours." Liu Yi clenched Yu'er's hands when he spoke, and the tenderness in his eyes looked at Yu'er's heart, and the girls and Zhen Mi couldn't help but laugh after hearing her husband's words.

"Two hundred and eighty-four times six hundred and seventy-eight, nine hundred and thirteen times two hundred and seven, five hundred and eighty-six times seven hundred and fifty-three." Yu'er smiled and fulfilled the duties assigned to her by her husband, although Liu Yi did not speak, but his eyes and movements showed his love for herself, although she was not as good as her sisters, she also had her own pride, she was her husband's first woman!

At this time, Zhen Mi was preoccupied with Liu Yi's calculations, and when it came to the last question, she simply put down the pen in her hand and watched Liu Yi calculate, and she was also figuring out the mystery in her heart. "The husband's algorithm is indeed faster than Mi'er, and there are many ingenious points, I wonder if the husband can come up with a question for Mi'er to try?" Zhen Mi was already in a convincing tone at this time, but she was also eager to try.

"Is that okay?" Liu Yi couldn't help but be a little stunned when he heard this, how long has it been, can Mi'er be able to master the ingenuity? However, in the eyes of the jade man, he still did what he said, "Twenty-eight times thirty-six, ninety-nine times two hundred and four, four hundred and seventy-eight times six hundred and fifty-nine." With the increase in difficulty, Liu Yi finally knew how talented his concubine was in number crunching, she had obviously written down all the rules of her own operation, and she could use the corresponding use of numbers well, except for genius, Liu Yi couldn't think of any words to describe the concubine in front of him, it seems that he was looking for the right person this time.

"Mi'er's intelligence is really willing to bow to her husband, so I'll tell you about the use of this zero." Liu Yi did not hide the shock in his heart when he spoke, and the smile on Zhen Mi's face was particularly sweet, the so-called female guard pleasing herself was exactly what she said, and after he said the usage of zero, the multiplication formula of Arabic numerals would no longer be difficult for Zhen Mi.

"Mi'er, you go back and sit down first, what I just said is multiplication, as well as addition, subtraction and division, that's it...... What I said today, after I went back, I wondered if I didn't understand anything, just ask my husband, and if my husband is not there, I can ask Mi'er. Barely suppressing the shock, Liu Yi roughly said the rest of the algorithms, today's teaching has just come to an end, and all the women at this time everyone found a pen and paper in the study, and wrote down the key points of her husband's words one by one, and everyone has a mind to eat it thoroughly, and her husband's move today will never only teach them.

"Husband, since this kind of algorithm is so exquisite and fast, it can be used in my Liu family's business, and it can even be used in various prefectures to check the population of farmers, it will definitely be more accurate, presumably the husband is here for this matter today?" Cai Yan's eyes lit up after pondering for a while, and he had already grasped his husband's thoughts, and said slowly at the moment.

"Madame's meticulousness is really extraordinary, and it is exactly what the husband has this intention for, and it is not only used here, so you must help your husband to practice it first, so as to teach more people." First there is Zhen Mi and then Cai Yan, Liu Yi is extremely satisfied with the ability of his wife and concubine, the calculation of Arabic numerals is convenient and fast, which can greatly reduce the complicated process of numerical calculation in various industries, so that the efficiency will be higher, which is of great benefit to the development of his own subordinates, and it is also where his real intentions lie!

"Husband, rest assured, the concubine will practice diligently every day, and live up to the husband's trust, but similar to today's meeting, the husband not only has to do a lot, but also can use it in the academy, this blackboard and bamboo pen are also quite useful." Cai Yan said again, the women also nodded again and again, today's meeting left a very deep impression on them, and after understanding their husband's intentions, their determination in their hearts was also firmer, and it was their wish to be able to serve their husband's great cause at home.

"Madame, don't worry, in addition to these Arabic numerals, there is still a lot of knowledge to teach you." Liu Yi smiled with satisfaction.

"The king, the old lady has passed the meal, and the eldest prince has been waiting for a long time." At this time, Liu's mother's maid Bi Jin came to pass the word, and the women woke up to realize that it was already dark at this time, and they were very hungry in their stomachs, so they unconsciously passed the hours quickly!