If the height of a cuboid is reduced by 5 cm, it becomes exactly a cube. The surface area of this cube is 80 cm2 less than that of the original cuboid. What is the volume of the original cuboid?
一个长方体，如果高减少5厘米，就正好成为一个正方体，这个正方体的表面积比原来的长方体减少了80平方厘米，原来的长方体的体积是多少立方厘米．
<gadget id="calculator">80 / 4 / 5</gadget>
<output>4</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">4 * 4 * 9</gadget>
<output>144</output>

<result>144</result>