If a part is subtracted from the height of a cuboid, the rest becomes a cube with a side length of 5 cm. At the same time, the volume is reduced by 100 cubic centimeters, and its surface area is reduced by how many square centimeters.
一个长方体，把高减去一部分，剩下的就成为一个棱长为5厘米的正方体，同时体积减少100立方厘米，则它的表面积减少多少平方厘米．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

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

<gadget id="calculator">5 * 4 * 4</gadget>
<output>80</output>

<result>80</result>