A residential building with a height of 50 meters, a length of 30 meters and a width of 25 meters, what is the floor area of this building in square meters?
一幢高50米、长30米、宽25米的住宅楼，我们说这幢楼的占地面积是多少平方米．
<gadget id="calculator">30 * 25</gadget>
<output>750</output>

<result>750</result>