If a cylinder has a volume of 500 cubic decimeters and a height of 25 decimeters, what is the area of the base in square decimeters?
一个圆柱体的体积500立方分米，高为25分米，底面积是多少平方分米．
<gadget id="calculator">500 / 25</gadget>
<output>20</output>

<result>20</result>