In a science class, Liangliang completely immersed a stone in a cuboid container with a length and width of 20cm. As a result, the water level rose by 2cm. What is the volume of the stone?
科学课上，亮亮把一块石头完全浸在长和宽都是20cm的长方体容器中，结果水面上升了2cm，这块石头的体积是多少？
<gadget id="calculator">20 * 20 * 2</gadget>
<output>800</output>

<result>800</result>