Pour some water into a cuboid water tank with a length of 60cm, a width of 4dm, and a height of 2dm. The height of the water surface is 10cm. Put an irregular stone in this water tank. At this time, the water level has risen by 5cm. Please find this irregular stone. The volume of a regular stone.
在一个长60cm、宽4dm、高2dm的长方体水箱里倒入一些水，水面高度为10cm，在这个水箱里放入一块不规则的石头，这时水面上升了5cm，请你求出这块不规则石头的体积．
<gadget id="calculator">5 / 1_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">60 * 4 * 10 * (1/200)</gadget>
<output>12</output>

<result>12</result>