In a cuboid swimming pool with a bottom area of 500m**2 and a water depth of 0.8m, how much water is in the pool in m**3.
一个底面积为500m**2的长方体泳池里，水深为0.8m，池中有水多少m**3．
<gadget id="calculator">500 * 0.8</gadget>
<output>400</output>

<result>400</result>