In a cuboid pool with a length of 60 cm and a width of 40 cm, a cuboid iron block is put into the water, and the water level rises by 2 cm. Given that the length and width of the iron block are both 20 cm, find the height of the iron block.
在一个长60厘米、宽40厘米的长方体水池里，放进一块长方体铁块，铁块全部没入水中，这时水面比原来上升2厘米．已知铁块的长和宽都是20厘米，求铁块的高．
<gadget id="calculator">60 * 40 * 2</gadget>
<output>4_800</output>

<gadget id="calculator">20 * 20</gadget>
<output>400</output>

<gadget id="calculator">4_800 / 400</gadget>
<output>12</output>

<result>12</result>