If an irregular stone is immersed in a cuboid container with a length of 15 cm and a width of 10 cm, the water level rises by 2.5 cm, what is the volume of the stone?
把一个不规则石块沉浸在长15厘米，宽10厘米的长方体的容器里，水面上升2.5厘米，石块体积是多少？
<gadget id="calculator">15 * 10 * 2.5</gadget>
<output>375</output>

<result>375</result>