This is the 2450th most frequent Chinese word.
平方米
Square meter.
In this sentence, "平方米" is used to express a measurement of area.
这间房子的面积是45平方米。
The area of this room is 45 square meters.
Here, "平方米" quantifies the area of a sports field in terms of size.
学校的新操场的大小达到5000平方米。
The size of the school's new sports field is 5000 square meters.
This sentence employs "平方米" to indicate a unit rate of cost per unit of area.