Zhang Weiwen worked all night, and finally sorted out a complete set of formulas before dawn, because he had not been in contact with this aspect of the formula for a long time, so many things had to be carefully deduced in a timely manner before they could be truly applied to realistic calculations.

Zhang Weiwen lay on the table and squinted for a while, a small soldier woke him up, he walked out of the tent, found that the sky was already bright, and saw a dense man in a long shirt standing in front of his tent, at this time Wen Jun came over from the side, only to see that the old man who was over half a hundred years old seemed to have not slept all night, and his eyes were thick bloodshot, but he was extremely bright.

"Again, the old man has brought you all the counters in this place, and the old man wants to see how you calculated this monstrous flood."

Zhang Weiwen smiled tiredly.

"I don't expect any earth-shattering reputation, I just hope that the people of Liuyang can suffer less." The counters and soldiers present looked sideways.

"Tautology, he is a gentleman, and the old man is ashamed of himself." Wen Jun bowed.

At this time, the river on the bank of the Liuyang River was surging endlessly, almost mixing with the distant sky, but Zhang Weiwen understood that they were clearly separated.

"Then, let's go with me to the big tent."

In the middle of the heights, there was a large tent that had been temporarily erected last night for a hundred people, and it could accommodate a hundred people in an instant, and the air could not help but look very hot and dirty, but there was no way, in such a season, there was really no way to find ice.

At this time, Zhang Weiwen was already soaked in a long shirt, and each group had its own project in charge, but according to the ancient arithmetic method, high-level multiplication and division became extremely cumbersome, and there were some knowledge to be used in the high-level line generation, and Zhang Weiwen could only calculate it himself, although he was considered to have taken the national abacus level, but he had not touched it for so many years, and he was very rusty, but Zhang Weiwen has always been a very stubborn person, so he will definitely grit his teeth and carry out this kind of thing.

"Ladies and gentlemen, it's dinner time."

The lunch was very rich, and compared to the current local prices, it was already quite a hearty meal.

Everyone went out one after another, and Zhang Weiwen took the food to a very cool place and wanted to enjoy it, because he hadn't eaten in the morning, and now he was dizzy from hunger.

Just as Zhang Weiwen was about to nibble on the chicken legs, a weak-crowned young man stretched out his hand and said

"You're Mr. Tautology, aren't you?" I saw that the young man was also holding a lunch box and looking at Zhang Weiwen with a smile.

"You're also Mr. Abacus here?" Zhang Weiwen stuffed a mouthful of rice and asked, the young man looked at Zhang Weiwen as if he was gobbling up, and suddenly said, "Look at Mr., it must have been that he didn't sleep last night, and he didn't eat breakfast this morning." ”

"You guessed it." Zhang Weiwen just wanted to eat now and didn't bother to listen, so he just said vaguely, at this time, the young man was a little funny, so he stopped talking, but opened the box and ate very elegantly and politely.

Zhang Weiwen had a nickname when he was in college, because he really ate a must, no matter how much, he could definitely eat it in five minutes.

So he raised his head and looked at the young man who was eating on the side, and had to say that some people ate like starving ghosts, and some people looked like nobles.

"I don't know who my brother's surname is?" Zhang Weiwen asked.

"The younger brother's surname is Zhao, and his single name is a single name, and his name is Jian'an."

"It turned out to be Brother Jian'an, although the sage said that he didn't say anything about food and sleep, but just now you came to talk to me when I was eating, so I always have to exchange courtesies, right?" At this time, Zhang Weiwen looked teased, and this aristocratic young man who was very elegant burst out laughing, and suddenly the image of a beautiful noble son was shattered.

"Brother Tautology is really interesting." The noble prince tidied up his appearance, and said with a smile, I saw that this son's long eyebrows and eyes were beautiful, and he was a little similar to the real jade he had seen at the Jinling Poetry Conference before, and this person was also surnamed Zhao, so Zhang Weiwen couldn't help but guess, "I don't know what the relationship between Brother Jian'an and the predecessors of Zhenyu is?" ”

The noble prince smiled slightly.

"True Jade Daoist was my father before he became a monk."

Zhang Weiwen was stunned for a moment, and then said with a smile, "Disrespectful, little prince, I didn't expect you, as a royal child, to do such a chore." "Even though I said it very respectfully. But in fact, Zhao Wei could understand Zhang Weiwen's meaning, but this prince's belly seemed to be very large, so he just smiled indifferently and said, "Actually, I also like the art of counting very much, I just took the liberty to see the results of Brother Tautology's calculations, and I felt very surprised, most of the symbols on it don't seem to be all of my dynasty?" ”

Zhang Weiwen touched his chin and said, "Actually, this is something I saw in an exotic ancient book, that is, simple symbols replace the extremely complex numbers in Chinese characters, and these characters are called Arabic numerals." ”

"Brother Tautology has a wide range of knowledge, I have never heard of these, but it seems that the calculation method used by Brother Tautology is also quite bizarre." At this time, Zhang Weiwen saw the young man's shining eyes, and immediately felt that this was an extremely treacherous little fox.

"The prince is very deep in this way, and I have my own set of calculation methods."

"Tell me about it."

"I don't have to comment, but I'm sorry that this is a family heirloom that I want to leave to future generations." After speaking, he drifted away, and the young man froze in place,

"Brother Tautology, wait for me."

In Xichuan City, Gu's thatched cottage is a flying firefly.

Now that the roast chicken restaurant next to the cottage has closed, Xiaobai and Jinyu have no choice but to take out sweet potatoes from the kitchen to roast.

"Hey! Bad woman, will you bake it, what should you do if it burns? Xiaobai looked at the black sweet potato with some distress.

"People are roasted like this, don't worry, it won't be bad." Jinyu wiped her nose and suddenly became a little flower cat.

The red flames slowly scorched the small sweet potato, and the little white round eyes looked straight at the sweet potato that exuded a fresh fragrance, like a star in the night, flashing and flashing, blinding Jinyu's eyes.

"Hey! It's a bit of a good thing, okay! When I return to Jinling, I will take you to Wangjiang Tower for a big meal. ”

"Really?" Little white wanted to bloom a flower on his face.

"Really!" Jinyu pinched Xiaobai's cheek.

At this time, Huang Shao'an, who had returned from going out, came to Mr. Gu's house and said with some concern, "Old Gu, pack up your things now and leave with me, I just came back from outside the city, and there, there is not even a single bird or a trace of bark, and many people have begun to eat Guanyin soil." ”

Mr. Gu didn't speak, he looked at the crooked neck tree outside with a bird's nest, sighed, and said, "You mean to say that, as you expected, soon, Xichuan City will be attacked by the homeless?" ”

"Xichuan is just a small city, but it is a necessary place to reach Jinling, and there are more and more refugees outside the city gate, so for the safety of the thirteen princes, we must go."

"Okay, I'll pack my things now and leave tomorrow morning."

"No, we'll go overnight."