After assembling 5 cubes of the same size into a cuboid, the surface area is reduced by 100 square centimeters. What is the surface area of each cube?
把5个大小相同的正方体拼成一个长方体后，表面积减少了100平方厘米，每个正方体的表面积是多少平方厘米．
<gadget id="calculator">100 / 8</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">(25/2) * 6</gadget>
<output>75</output>

<result>75</result>