A cuboid water tank has a length of 8dm, a width of 5dm, and a water depth of 3dm. When a stone is put into the water tank, the water level rises by 2dm. What is the volume of this rock?
一个长方体水箱，长8dm，宽5dm，水深3dm，当把一块石块放入水箱后，水位上升了2dm．这块石块的体积是多少？
<gadget id="calculator">8 * 5 * 2</gadget>
<output>80</output>

<result>80</result>