定和值范围的技巧

简介：An adult man needs about 15 kilograms of grain per day, 45 kilograms in one month and 270 kilograms in six months, which is equivalent to two stones of rice. As for the three volunteers, it cost six stones of rice. At the current price of rice, converted into silver, it was 24 taels. This means that if a person wants to be exempted from military service, he needs to pay 24 taels of silver.