Now he is getting mader and mader, eating only one meal a day, stuffing until he can't fit it anymore, and then he picks up the little wooden boat in the lake and floats on the water all day; It's fortunate that it's not summer, otherwise it's strange that you won't be sunburned a few layers of skin.

The ducks on the lake are familiar with him, and every time they see him coming, they just croak, but they don't panic at all, and sometimes they will circle around him, and they are very envious of Cao'er; serious men are the loveliest, and Cao'er can't help but secretly look at this kid now, guessing what he wants to do? His brother's new book had been ruined by him, and then he threw it aside, and he stood on the boat all day, poking a bamboo pole into the lake, and after seeing the water stains on the pole, he recorded it in a small silk paper notebook, and he didn't know what he was remembering, which was so strange.

"There is a method for calculating the area in the master's new book, which can not only calculate the circumference and the area of the square and rectangle that I already know about the road, but also the area of triangles, diamonds, and circles, and there is also a kind of method called trapezoid, which has rules and methods for calculation. The surface of the lake is irregular, but I can divide it into regular shapes and calculate the area. But the area alone is not enough, how can we calculate how many buckets of water this lake is equivalent to? The big wooden barrel I use can hold ten catties of water, as long as I know how many buckets of water this lake can hold, I can weigh the lake water! The master's book is shallow, and there is no further calculation method given in it, but I don't need to be in a hurry, as long as I measure the depth of different positions, and then get an average depth, I can go to the master, and the area and depth are combined. I'm sure to get the answers I need! ”

Wuqian holds a bamboo pole for bathymetry in his hand. Talking to himself like a madman; Cao'er deliberately ran to the gazebo and set up hot milk tea and chicken cakes. There was even a roast leg of lamb, and the aroma overflowed the entire lake, and he didn't realize it, and there was only this lake water in his eyes.

The boat gradually sailed to the middle of the lake, and a bamboo pole was not protruded, but it was found that the length was not enough, and the longest one could not reach the bottom of the lake. Unconsciously leaned half of his body out of the boat, but forgot that he was still on the water, and his body shook and fell into the water, splashing a lot of water.

"Sangwazi, he fell into the lake!"

"Seems to be."

"I remember he couldn't swim, so save people!"

"Don't worry, you can't die him!"

Sang Wazi plunged into the lake and rescued the Yue Guo Bull who was almost frozen. This is really a stubborn cow, is Heian Lang's problem so easy to solve? Can you take a pole and poke it around to solve the puzzle?

complained in her heart, but Sang Wazi secretly admired this kid. It's yourself who you replace. When you don't know how to go to the water, you don't dare to go on the boat alone, let alone in winter. It's not a problem solving, it's a game of life.

Looking at Wu Li, who was trembling by the fire, Cao'er couldn't tell what it was like, and couldn't help but persuade him: "When people mix rouge in the future, just let you help, it's okay if you lose to your brother, don't work so hard, okay?" Sang Wazi, what else are you looking at, go and help him get clean clothes, and you can change yourself too, don't get cold. ”

Changing into the clothes brought by Sang Wazi, Wuli didn't seem to see his hostile gaze, and said to Cao'er with a smile: "Sister Cao'er, the pole is not long enough, but I saw it after I fell to the bottom of the water, in fact, it was only half a foot away." With this depth, plus what I recorded before, I can derive the average depth of the lake, which should be "quickly turned out a small abacus from the wet clothes, 'crackling' for a while, and laughing: "The average depth of the lake is one zhang and one foot and three inches!" Ha Luha, I'm going to find Baizi! ”

This kid hasn't forgotten the depth of the lake since he fell into the water? Sang Wazi and Cao'er looked at each other, this is a real madman, even crazier than Mr. Yang Zhu!

When Wu Zhen rushed into Bai Dong's room, his hair was not yet dry, and it was like a bird's nest, but Bai Dong seemed to have seen the most moving beauty and the most noble nobleman, so he asked him to sit in front of him and poured him a cup of kung fu tea: "Actually, you don't have to work so hard to measure the depth of the lake, I have already measured it when the lake was built; If you come to me, I will give this condition, so you don't have to work so hard. ”

"Maybe you're wrong? Even if it's an approximate value, I'm more confident that I'm measuring it myself. ”

"Good. The things you want are here, and how many days will it take you to give me the answers? ”

Bai Dong smiled and handed Wu Yuan a first draft, which was a new book that had not yet been printed, and the title of the book was "A Preliminary Study of Solid Geometry".

It's like a child who sees his favorite toy, doesn't bother to drink tea, and excitedly opens the manuscript to read, just at a glance, he is deeply fascinated, and he forgets the time, so he sits opposite Bai Dong and looks at it.

Bai Dong didn't bother him, and waited quietly for a few hours, only to see him close the manuscript, pick up the pen and paper, take out the abacus, and calculate it cracklingly, and after more than half an hour, Wu Yuan suddenly laughed loudly: "Master, I have calculated it!" ”

"Not bad, the error is not too big."

Bai Dong took the answer and read it, nodded slightly, and then picked up "Sixue" and handed it to him: "You are quite talented in arithmetic, this time you win, you can become my personal disciple." How do you feel when you look at this book again? ”

There is really no well-rounded genius in the world, Wu Yuan took "Sixue" and read it a few times, and then handed it back to Bai Dong with some boredom: "I don't understand." ”

"Hehe, if you don't understand it, you don't need to read it, let's go, go eat, it's night now." Touching this kid's head, Bai Dong suddenly felt a little worried about Lu Zhen, if the future king of Yue Kingdom became a mathematician, she would definitely be disappointed, right?

***

"The six arts of the gentleman, etiquette, music, archery, royalty, calligraphy, and counting, the way of arithmetic is ranked at the end, and I can't imagine that the birth of this Baizi's book "Baizi's New Calculation" will make the world face up to the number of ways from now on, which is equivalent to proving that the way taught by Master Confucius is orthodox at the root, and there are no stubble branches!"

Spacious and bright inside the back hall of the ancestral hall. Dozens of men sat upright. or all hair is white. Or the first time I saw the gray, there were also young people with black hair, each of whom wore a wooden crown on his head and wore cloth clothes, although he was not as diligent and thrifty as the Mo family, and even his shoes had to be made of grass, but he was also full of cloth color, and none of them wore gorgeous clothes.

Although these men were not richly dressed, they all looked bright. The eyes are clear, the behavior is polite, and there is no white ding, at first glance, it is a higher-level cultivator and heirloom than the scholarly family; At this moment, they are respectfully being taught, looking at a white-haired old man sitting at the top with admiration, reverence, and even awe.

The words just now were said by this old 'immortal', the six arts of the gentleman came from Zhou Li, but they were vigorously promoted by Confucius. It is not wrong to say that it was passed down by Confucius.

"What my father said was that it was a pity that books were good books. The purpose of publishing the book is inferior. The author is Bai Dong of Qin Guo who first appeared because of the invention of a new poetic style a few days ago, and he also wrote a book of "Kindergarten Jungle" before. I thought he would have a lot of writings, but I didn't expect that he was too busy with the learning of merchants to drill camps, and he actually went to Lantian to burn porcelain and other extravagant things, which was useless in saving the world and harming the world. Now he is boasting about Haikou, saying that he wants to build a Fengming Academy that is ten times larger than the Jixia School Palace, Fengming Qishan is so big, I am afraid that what he is most worried about is that the School Palace has been completed, but there is no Tianxia Xuezong to settle in"

A white-haired old man sitting at the bottom bowed in reply. He is also in his seventies, and he is already a long-lived old man in this era, but in front of the first old man, he is as restrained as a teenager.

"Yushan, my father taught you, a gentleman should be consistent in his heart and have something in his heart, as long as it is not a deceptive language in the dark room, he should spray as much as he wants, do you want to say that Bai Zi published this "Bai Zi New Calculation" to attract scholars and scribes from all over the world, not to study sincerely? And his name is Baizi, in fact, he carefully drills the camp, covets gold beads and beautiful jade, and doesn't I see the Yan family? Since you have this intention, why only say half a sentence, this is the work of a villain, and it will be absolutely impossible in the future! After the sect meeting, face the wall by yourself for three days, and think about your own past," the crane-haired and child-faced old 'fairy man' shook his head slightly.

"Thank you for your father's teachings, and my son is willing to be punished. However, my son still thinks that this Bai Dong's knowledge is shallow, and he is mostly a trick and trick, especially the sharp word, so he really doesn't care about my Yan family! ”

The old man named Yushan respectfully admitted his mistake, but this was just an admission of his father's mistake, and it would not change his opinion of Bai Dong.

"Paradox! If I, Confucianism, are as rebellious as you, how can I not be weak? Etiquette and music education is the way to save the world, but is it not the development of business? If Bai Dong had no merchant means, how could he make Duke Xu of Qi generously donate 100,000 stones? If there was no food, and only relied on etiquette and music, those victims of the Qin State would have starved to death eight times long ago! Meng Ke only said that the people are precious, but he also said that when did he save thousands of people? But in your eyes, this person who is full of strange skills and clever words has saved tens of millions of victims and made a country's literature and affairs gradually prosperous! ”

"Don't you look at my Yan family? In the old man's opinion, the real purpose of not entering my Yan family is the great Confucian on the corner of your mouth and the sage in the article! Face the wall for three days, change to March, think about it every day, record it every day, if you don't remember it for a day, if you don't remember it, you don't want to say that your surname is Yan in the future! ”

The old man was furious, picked up a book from the desk next to him, and threw it at his son: "When facing the wall, let me read this "Thinking" with my heart, and I must also take notes every day, and there must be no prevarication!" ”

"No, my son will go to the wall and think about it, my father must be angry, don't be angry"

Yan Yushan never imagined that his father would be so angry, kneeling on the ground and kowtowing repeatedly, hating to replace him with his body; Dozens of men from the Yan family also knelt down one after another, calling the old ancestor to calm his anger.

"From today onwards, everyone in the Yan family must read "Sixue" intensively, this is a book of great wisdom, we must read it carefully, read it intensively! There is also the book "Baizi Arithmetic", if you can't learn the one-dimensional equation and the abacus formula, you will be punished with the same wall! The women of the Yan family also have the same need to learn, the abacus can not be played, but the arithmetic must be known! ”

Ps: Thanks to the 'Zeuku' and 'JimH' brothers for their monthly pass support :)

Thanks to the generous reward of the 'Monkey 請の救兵' and 'Iron Man' brothers :) (To be continued......)