加拿大算法

简介：Zhang Qing thought for a while and answered hesitantly: I'm afraid it will cost a lot of money. If you want the war horse to gain weight, you must feed it with concentrate. But now the price of rice and millet is extremely high. A stone of rice can be sold for three taels of silver. The war horse has nothing to eat. There are too many, so my servant is worried. These five hundred horses will require an additional one thousand five hundred taels of silver in one month.