A cuboid glass. Measure 40 cm long from the inside. The width is 25 cm. The height is 30 cm. First pour 10 cm deep water in it. After the stone was completely submerged in the water, the water level rose by 12 cm. Find the volume of the stone.
一个长方体玻璃杯．从里面量长40厘米．宽为25厘米．高为30厘米．先在里面倒入10厘米深的水．再把石头完全浸入水中后，水面上升了12厘米．求石头的体积．
<gadget id="calculator">40 * 25 * 12</gadget>
<output>12_000</output>

<result>12_000</result>