translation.en: They must know three things: They must have good handwriting, because the data is handwritten; they must be able to read; and they must be able to do multiplication, division, addition and subtraction in their head.
translation.zh: 他们必须了解三件事： 书写要规范，因为资料都是手写的； 有阅读能力； 会在脑子里 作加减乘除。