There is a rectangular parallelepiped glass tank with a length of 80 cm and a width of 60 cm. There is 80 cm deep water in it. Now a cuboid iron block with a length of 30 cm and a width of 24 cm is submerged in the glass tank. The water level rises by 9 cm. What is the height of the iron block in centimeters.
有一个长方体玻璃缸，长80厘米，宽60厘米，内装有80厘米深的水，现在将一块长30厘米、宽24厘米的长方体铁块浸没在玻璃缸中，水面上升了9厘米，试求铁块的高是多少厘米．
<gadget id="calculator">80 * 60 * 9</gadget>
<output>43_200</output>

<gadget id="calculator">30 * 24</gadget>
<output>720</output>

<gadget id="calculator">43_200 / 720</gadget>
<output>60</output>

<result>60</result>