A cuboid has a length of 10 cm, a width of 8 cm, and a height of 15 cm. The height filled with water is 5 cm. When a stone is placed horizontally, the height of the water rises to 10 cm. What is the volume of the stone?
一个长方体的长10厘米，宽8厘米，高15厘米，装水的高度是5厘米，把一块石头放入水平，水的高度升高到了10厘米，求这块石头的体积？
<gadget id="calculator">10 - 5</gadget>
<output>5</output>

<gadget id="calculator">10 * 8 * 5</gadget>
<output>400</output>

<result>400</result>