A rectangular parallelepiped glass tank is 10 cm long and 25 cm wide when measured from the inside. The water depth in the tank is 12 cm. After a stone is put into the water, the water surface rises to 16 cm. Find the volume of the stone.
一个长方体玻璃缸，从里面量长是10厘米，宽25厘米，缸内水深12厘米，把一块石头放进水中后，水面升到16厘米，求石头的体积．
<gadget id="calculator">16 - 12</gadget>
<output>4</output>

<gadget id="calculator">10 * 25 * 4</gadget>
<output>1_000</output>

<result>1_000</result>