A cuboid tank with a length of 20 cm and a width of 15 cm has a water depth of 6 cm. After placing a cube stone, the water depth is 10 cm. What is the volume of the stone?
一个长20厘米，宽15厘米的长方体水槽中水深6厘米，放入一正方体石块后，水深10厘米，这石块的体积是多少？
<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<gadget id="calculator">20 * 15 * 4</gadget>
<output>1_200</output>

<result>1_200</result>