A cube container, the bottom side length is 20 cm, put a stone, the water level rises by 0.5 cm, what is the volume of the stone in cubic centimeters?
一个正方体容器，底面边长是20厘米，放入一个石头后，水面升高了0.5厘米，这个石头的体积是多少立方厘米？
<gadget id="calculator">20 * 20 * 0.5</gadget>
<output>200</output>

<result>200</result>