On the floor plan of a teaching building, the measured building is 16 cm long and 7.2 cm wide. Given that the scale is 1:250, what is the actual area of this teaching building in square meters?
一幢教学楼的平面图上，量的楼长16厘米，宽7.2厘米．已知比例尺是1：250，这幢教学楼的实际面积是多少平方米？
<gadget id="calculator">40 * 18</gadget>
<output>720</output>

<result>720</result>