A cuboid fish tank has a length of 30 cm, a width of 20 cm, and a water depth of 8 cm. When a stone is placed in the water, the water level rises by 4 cm. What is the volume of the stone in cm**3.
一个长方体鱼缸，长30厘米，宽20厘米，水深8厘米，将一块石头放入水中后水面上升4厘米，这块石头的体积是多少厘米**3．
<gadget id="calculator">30 * 20 * 4</gadget>
<output>2_400</output>

<result>2_400</result>