A cuboid water tank is 2 decimeters long and 1.5 decimeters wide. A stone is placed in it, and the water level rises by 0.5 decimeters. What is the volume of the stone?
一个长方体水缸，长2分米，宽1.5分米，放入一块石头，这时水面上升了0.5分米；这块石头的体积是多少？
<gadget id="calculator">2 * 1.5 * 0.5</gadget>
<output>1.5</output>

<result>1.5</result>