In a cube tank with a side length of 30 cm, a cuboid metal block with a length of 10 cm and a width of 8 cm is completely immersed in the water, and the water level rises by 2 cm. What is the height of the cuboid metal block in cm?
一个棱长是30厘米的正方体水槽，将一个长10厘米、宽8厘米的长方体金属块完全浸入水中，水位上升2厘米，这个长方体金属块的高是多少厘米？
<gadget id="calculator">10 * 8</gadget>
<output>80</output>

<gadget id="calculator">2 / 80</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">30 * 30 * (1/40)</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>