In a tank with a length of 8dm, a width of 7dm, and a height of 100cm, a cuboid iron block with a length of 35cm and a width of 20cm is placed. When the iron block is submerged in the water, the water level rises by 5cm. What is the height of the iron block in centimeters?
在长8dm、宽7dm、高100cm的水槽中，放入一个长35cm、宽20cm的长方体铁块，当铁块没入水中时水面上升了5cm．铁块的高是多少厘米？
<gadget id="calculator">8 * 10</gadget>
<output>80</output>

<gadget id="calculator">7 * 10</gadget>
<output>70</output>

<gadget id="calculator">80 * 70 * 5</gadget>
<output>28_000</output>

<gadget id="calculator">35 * 20</gadget>
<output>700</output>

<gadget id="calculator">28_000 / 700</gadget>
<output>40</output>

<result>40</result>