A cuboid tank is 50cm long, 20cm wide, and 8cm deep. After a stone is completely submerged in water, the water surface is 10 cm high, find the volume of the stone.
一个长方体水槽，长50cm，宽20cm，水深8cm．把一块石头完全浸没在水中后，水面高10cm，求石头的体积．
<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">50 * 20 * 2</gadget>
<output>2_000</output>

<result>2_000</result>