Coincidentally, when Xu Yunyan was going to teach them a new arithmetic method besides Jiuzhang's arithmetic, soldiers from the government came to report.
"Sir Captain, it's time to harvest the soybeans in the south. Everyone seems to be growing very well. I would like to invite Lord Captain to come and have a look to determine whether to harvest now or hold some kind of ceremony."
What on earth are these people thinking, actually collecting beans and having a ceremony?
But Xu Yunyan looked at Li Chengqian and Li Chengdao and smiled and said to them.
"It just so happens that we go to see how much beans can be harvested later? As for holding a ceremony, don't you think it is necessary? The food or other things you have worked so hard to grow can be known in terms of its yield and quantity. It is not just a Is it a happy thing? This is a celebration of your hard work!"
When Xu Yunyan said this, the two of them felt that this was indeed the case. They followed Xu Yunyan ecstatically to see what their labor income was like.
On the way to the bean field, Xu Yunyan asked the two of them, "I wonder if you two know the yield of these beans? Of course I am talking about how much there is in other places."
The two of them were a little embarrassed at this moment.
"This...I can't wait for sure."
"Do you know the output of other grains?"
"I still don't know."
Xu Yunyan sighed, "The output on our farm may be different from the output in other places. You must have a plan in mind. Don't use the data on the farm to calculate the world's output, and don't think about the output on the farm. , the output of other places can be similar to it. It should be noted that natural disasters and man-made disasters are unpredictable, and many things are not ours to decide."
This is not to say that the two people spoke less vigorously, but they encountered a series of unusual circumstances such as drought, floods, and locust plagues, and the yields they obtained were different.
The two nodded hurriedly, "What the teacher said is true, I will remember it!"
Just as they were teaching by words and deeds, they arrived at the bean field. Seeing many students gathered here, Xu Yunyan said a few words to their shouts, and then many students began to harvest the beans.
The beans are still very fresh now, but the sun is not bad, and it took only one day to dry them all to meet the delivery standards.
Under the command of Xu Yunyan, these students began to harvest grain. Although the harvest of beans was not much, it also made the students very happy. This was the result of their hard work.
"Mine, this is mine!"
The students looked at the golden beans and were extremely happy. They picked up every bean that fell on the ground, blew it clean and put it into the tools.
After the beans are packed into basket after basket, measurement begins.
During this measurement, Li Chengdao and Li Chengqian surrounded Xu Yunyan curiously.
"Teacher, this bean calculation for you is similar to the Nine Palaces arithmetic method. I wonder what the new method you are talking about is?"
I saw that Xu Yunyan wrote down the weight of each basket there. Of course, I remember that this was written here according to the Chinese characters in "Nine Chapters of Arithmetic".
Now he doesn't dare to dare to put forward some novel opinions. Although he remembers that he has read many books before and put forward some novel opinions, which makes the world feel amazing, but shouldn't these things be put forward by those in power? He is just a little guy now, and bringing this up would be disrespectful to the ancient sages.
After Xu Yunyan finished counting the weight of basket after basket of supplies, he arranged them in a row from top to bottom, and calculated his total in an instant.
Li Chengdao and Li Chengqian were shocked at this moment.
"Are the results out?"
"That's what I call a new way of computing!"
this?
Li Chengdao and Li Cheng were stunned here.
"What's going on? Teacher, can you give me some guidance?"
"You guys watch..." Xu Yunyan said and handed them the simplest addition and subtraction formula.
All the numbers in a column are added up or subtracted and then the difference or sum is calculated. This calculation surprised the two of them.
It used to be done counting one by one, but now it's done row by row. Although it's not much advanced, the work efficiency is obviously faster than before.
Li Chengdao and Li Chengqian couldn't help but compliment Xu Yunyan's literary level. Xu Yunyan was probably too happy teaching, so he randomly said, "If there are more than a dozen copies, how do you count them? Of course they are the same number."
At this moment, Li Chengqian and Li Chengdao were ready to count on their fingers.
Xu Yunyan smiled directly, "Don't bother me, I'll teach you a method."
The formula for immediate multiplication and division was given to them again.
At this moment, Li Chengdao and Li Chengqian's eyes lit up.
"I didn't expect that the teacher's level not only in literature but also in arithmetic is so high. I really don't know who the teacher is from, and he can have such attainments. I really want to meet the teacher's master."
Xu Yunyan felt a little embarrassed at this moment. "My arithmetic master? My master has passed away. He was an old Taoist priest who traveled around the world. His surname seems to be Li."
"Last name is Li?"
When Xu Yunyan said this, Li Chengdao and Li Chengqian were instantly startled.
The Li Tang Dynasty has always believed that the Supreme Lord Li Er is their ancestor. Although this cannot be verified, now that Xu Yunyan said that he learned this skill from a Taoist named Li, it convinced the two of them.
It is reasonable for a Taoist priest named Li to be able to teach such a student, not to mention that it is unclear whether this Taoist priest named Li has anything to do with their ancestor Li Er, who is called Taishang Laojun.
After the two of them got the news, they looked at Xu Yunyan with bright eyes.
"Teacher, I wonder if there is anything else you can teach us? These nine chapters of arithmetic compare with your imagination. Your method is too novel. We still want to learn new things."
"Learn something new? It's easy. Let me tell you another problem about a chicken and a rabbit in the same cage!"
Chickens and rabbits in the same cage can be regarded as a difficult problem in "Nine Chapters of Arithmetic", but Xu Yunyan used the hypothesis method to assume that the chicken is something, and the remaining rabbits are the number of rabbits in the same cage minus the hypothesized thing.
Then he easily solved the number of chickens and rabbits through a linear equation of one variable or a linear equation of two variables, which stunned the two of them.
"This...has it been solved? Among the nine arithmetic calculations, calculating the chicken and the rabbit in the same cage is very troublesome, but the teacher solved it easily. This equation is really useful!"
Xu Yunyan teaching the two highnesses here also aroused the curiosity of other literati. As students of Imperial College, they were not without insights.
Seeing Xu Yunyan explaining calculation methods other than the nine chapters here, they came forward curiously. They didn't take it seriously at first, but when they saw that Xu Yunyan could easily solve the problem they were thinking about, they were even more surprised. Incessantly.
At this time, Li Chengqian and Li Chengdao seemed to have really obtained a treasure, and they kept asking Xu Yunyan some mathematical questions.
Some new calculation methods, some simple methods, and some new ideas constantly refresh their three views.
While Xu Yunyan was teaching the two highnesses, and other Taixue students came to study when they had time, time passed very quickly, and all the food and materials in the entire farm were collected.
Seeing the food harvested by their hard work, all the Taixue students were very excited, and they even knew about the hard work of farmers all over the world.
If there is no effort, there will be no gain. They know how low the food yield is if they want to rely on the sky for food. They are also shocked by what kind of harvest they can get by relying on their own hands in this good season.
It is absolutely impossible for a family to make a living on those few acres of land without worrying about food and clothing. If they want to live a good life, these Taixue students know that the burden on their shoulders is still very heavy.
