Solve by equation: Shanghang Education Clothing Factory will produce a batch of student clothes of a certain model. The topic is as follows.

Analysis: suppose that X-meter cloth is used to produce tops and Y-meter cloth is used to produce pants.

Equivalence relation: ① 600 m plain cloth; The number of coats is equal to the number of trousers.

Solution: We assume that X-meter cloth is used to produce tops and Y-meter cloth is used to produce pants.

According to the meaning of the question, X+Y = 600, 2/3x = y.

Solution, x=360y=240.

It takes 360 meters to produce tops, 240 meters to produce pants, and 240 sets can be produced.