A cuboid tank with a length of 30 cm and a width of 25 cm has a water depth of 12 cm. After placing a cube stone, the water depth is 19 cm. What is the volume of the stone?
一个长30厘米，宽25厘米的长方体水槽中水深12厘米，放入一正方体石块后，水深19厘米，这石块的体积是多少？
<gadget id="calculator">19 - 12</gadget>
<output>7</output>

<gadget id="calculator">30 * 25 * 7</gadget>
<output>5_250</output>

<result>5_250</result>