According to the meaning of the topic, "the area of planting cypress seedlings is one of the areas of regular nurseries."
Half of less than 20 square meters "equals" the area of cypress seedlings plus 20 square meters.
It is a half square nursery area, and the area of planted pine seedlings is 120.
Square meters, drawing shows that one and a half of the nursery is cut from pine seedlings.
20
Square meters, half of the land area is: (120-20)
Square meters, one and a half times the area of this land multiplied by two is the total area of this land.
Area product, i.e.:
( 120-20) ×2
= 100× 2
= 200 square meters