Put a stone into a glass container with a length of 8 decimeters, a width of 5 decimeters, and a height of 4 decimeters. The water level rises by 2 decimeters (the water does not overflow), what is the volume of the stone in cubic decimeters ．
把一块石头放入一个长是8分米，宽是5分米，高是4分米的玻璃容器里，水面上升了2分米(水未溢出)，这块石头的体积是多少立方分米．
<gadget id="calculator">8 * 5 * 2</gadget>
<output>80</output>

<result>80</result>