Less than half a year after coming to Datang, Li Qinzai didn't want to set up any "wise master" or something like that, he was too tired and too pretending.

In his previous life, he only scored more than 400 points in the college entrance examination, and he only took two books, and he was late and absent from class to fall in love during college, and he was familiar with the song halls, bars and restaurants outside the school for four years, but he didn't know what the school librarian was like.

It is even more common for Li Qinzai to cry and repent in front of the subject teacher every semester, in exchange for the teacher's temporary soft-heartedness, and continue the decadent college life next semester.

If Li Zhi knew about the behavior of this master in his previous life, he was afraid that he would shout a knife and axe on the spot and hack this swaggering master to death.

The time when he came to the Tang Dynasty was not short, and Li Qinzai had long known that in fact, the ancients still had a lot of research on mathematics, such as "Nine Chapters of Arithmetic", "Island Sutra", "Zhou Ji Sutra" and so on, which are about equal to the mathematics textbooks of later generations.

As we all know, when the indigenous monkeys of Europe and America were still picking wild fruits and sleeping in caves, the ancient ancestors of China had already calculated the seven decimal places of pi.

The achievements are not proud, and the study of mathematics is also very in-depth. It's a pity that the imperial court doesn't pay attention to the Ming Arithmetic Department, every time the scientific examination is taken, the talents of the Ming Arithmetic Department are far inferior to the Ming Economics, and a few people are in high school, and they are also idle and left to fend for themselves.

This has led to the gradual withering of the talents of the Ming Arithmetic Subject, and the monarchs and ministers of the court have never felt that the withering of the Ming Arithmetic Talent will have any impact on the country, because it seems to have no impact at all.

Today, in front of Li Zhi, Li Qinzai used his mathematical knowledge to teach Li Zhi a good lesson.

Both ancient and modern times are very effective, and the impact on the country is also very significant.

Staring at the formula on the sand, and the series of Arabic numerals and strange symbols, Li Zhi's eyes were about to bulge.

"These ...... Did you just figure it out? Just use this bunch of weird stuff to figure it out? Li Zhi asked in disbelief.

Li Qinzai nodded: "Yes, this is just one of the functions of the Ming Arithmetic Department, it can be used in all aspects." ”

"How to calculate the height of the beams, the size of the bricks, and how deep the foundation is when building a house."

"The army's logistics grain and grass are heavy, how much they transport, how many people are equipped with horses, and how long it takes time to get from place A to place B."

"When wheat is planted in an acre of field, the wheat seeds are horizontal and vertical, the distance is how much, the total number is, and the estimated yield is much."

"Your Majesty, the knowledge needed in all aspects of life can be easily done by the Ming Arithmetic Department, just like what the minister just did, draw a string of strange symbols, and the answer can be found in a moment."

Li Zhi couldn't help but straighten up, at this time he had really begun to listen.

"What do you mean by this strange string of symbols?"

"They are called arithmetic symbols, and Arabic numerals......"

Li Zhi frowned: "What is Arabia?" Is it a place name? Why isn't it called 'Datang Digital'? ”

"Well, you can call it anything, it actually originated in Tianzhu, and it was passed on to the big food many years before it really became popular, and it is very easy and convenient to remember the numbers."

Speaking of "big food", Li Zhi's face was not very good-looking, and he couldn't help but snort.

Da Shi is also known as the Middle East Arabia in the previous life, bordering the Western Regions of the Tang Dynasty.

During the Zhenguan period, the Tang Dynasty set up the Western Regions, destroyed the Gaochang Kingdom, set up the Anxi Protectorate in Xizhou, and led the 36 countries of the Western Regions.

Li Qinzai demonstrated on the ground with a long stick, and said: "If you use our Chinese characters to count, such as nine thousand eight hundred and seventy-six, Your Majesty, please see, the number of thousands needs to be written in seven characters, which is slow and inconvenient, and it is easy to make mistakes, if you use Arabic numerals, ......"

"Datang Numbers!" Li Zhi's tone corrected heavily.

"Uh, yes, Datang numbers."

Don't dare to fight with Li Zhi, what intellectual property rights, what birthplace, are all floating clouds, as long as I think it is Datang's, then it is Datang's, and I don't accept it.

"Ahem, if you use Datang numbers, you only need to draw four symbols to write out the thousands."

Saying that, Li Qinzai wrote down the four numbers "9876" on the sand.

Li Zhi's eyes widened, compared the difference between numbers and Chinese characters, and then nodded slowly: "Yes, it's really easy to use, are these symbols created by Jing Chu?" ”

"Your Majesty, the minister just said that it originated in Tianzhu and later ......"

The gentle and elegant Li Zhi exuded an imperial momentum at this time, interrupted his words with a heavy wave of his hand, and said calmly: "No matter, it was created by Jing Chu, take it, and Datang used it." In the future, it will be called Datang Digital. ”

Li Qinzai grinned, this unreasonable face was like a woman in the nourishment of love,...... Did you learn it from Empress Wu?

Li Zhi pointed to those operation symbols again and said, "These strange symbols ......"

Li Qinzai learned wisely this time, and said confidently and firmly in a confident tone: "It is all created by the minister, the exclusive copyright, and the offender will be investigated." ”

Li Zhi smiled with satisfaction, relieved by Li Qinzai's ascension.

"The time you counted the two armies in pursuit...... Is it really the algorithm of the Ming Arithmetic Department? ”

"Yes, I call it a 'mathematical formula', and everything in the world can use formulas to demonstrate their laws, and if you understand these laws, everything is under control."

Li Zhi was shocked, he was an emperor, no matter how gentle and elegant he was, he was also an ambitious emperor, and he was particularly interested in the words "everything is under control".

Li Qinzai was really worried that the hypertension patient in front of him would be so excited that his blood vessels would burst, and if something happened in the Li family's Zhuangzi, Li Qinzai would be killed.

So Li Qinzai hurriedly explained: "The minister is exaggerating, the minister just now refers to the calculation method, not that he can really master it, even if everything in the world is not calculated, it is already in the hands of His Majesty, and the way of clear calculation is just to let the world better understand the laws of all things." ”

Li Zhi's expression gradually calmed down, obviously he was no longer middle-aged in middle school, and the congested blood vessels were not so boiling.

"I didn't expect the Ming Arithmetic Department to be so useful...... Li Zhi muttered.

Li Qinzai said: "Your Majesty, if you calculate it clearly, it will be of great use to the state, from marching to the formation of the army, the yield per mu of farming, to the small food, clothing, housing, transportation, houses and bridges, etc., you can calculate its laws in advance......

"But the minister heard that there are only a few people in the imperial court every year, so much arithmetic, but so rare, if this knowledge is lost, it will be a big loss to the Tang Dynasty."

Li Zhi looked at the formula on the sand and was fascinated for a long time, Li Zhi smiled bitterly and said: "Maybe the imperial court doesn't pay enough attention to Ming arithmetic, but Jing Chu might as well think about it again, who else is so proficient in arithmetic in the world, except for Jing Chu?" ”

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