Submerge an iron ball in a cuboid container with a length of 25 cm, a width of 10 cm, and a height of 30 cm. The height of the water surface rises from 20 cm to 24 cm. What is the volume of the iron ball?
把一个铁球浸没在长25厘米，宽10厘米，高30厘米的长方体容器里，水面的高度由20厘米上升到24厘米，这个铁球的体积是多少？
<gadget id="calculator">24 - 20</gadget>
<output>4</output>

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

<result>1_000</result>