There is a piece of iron with a side length of 100 cm. Now it is melted and cast into a cuboid with a side length of 5 cm. What is the length of this cuboid?
有一块棱长是100厘米的正方体的铁块，现在要把它溶铸成一个横截面边长是5厘米的长方体，这个长方体的长是多少厘米？
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">100 / 25</gadget>
<output>4</output>

<gadget id="calculator">100 * 100 * 4</gadget>
<output>40_000</output>

<result>40_000</result>