A swimming pool is 30 meters long, 20 meters wide, and 2 meters deep. What is the area of the swimming pool?
一个游泳池长30米，宽20米，深2米，这个游泳池的占地面积是多少．
<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<result>600</result>