The Nine Chapters on the Mathematical Art, Vols. 1-3

The text is contained within a traditional woodblock print layout, featuring a thick outer border and vertical rules separating each column of text.

The [240 paces] is the mu method. One hundred mu is the qing method. Therefore, by dividing [by these], one obtains [the result].

Suppose there is a field 1 li a Chinese unit of distance wide and 1 li long. How much is the field?
Answer: 3 qing and 75 mu.

Suppose there is another field 2 li wide and 3 li long. How much is the field?
Answer: 22 qing and 50 mu.

The method for fields measured in li is: multiply the number of li in width and length to get the accumulated li. Multiply by 375 to get the number of mu.

Note: In this method, multiplying the number of li in width and length gives the accumulated li. Within one square li, there are 3 qing and 75 mu. Therefore, by multiplying by this, one immediately obtains the number of mu.