If the height of a cuboid is shortened by 4 cm, it becomes a cube, and the surface area is reduced by 80 cm2. What is the volume of the original cuboid in cubic centimeters?
把一个长方体的高缩短4厘米，就变成了正方体，表面积减少了80平方厘米，原来长方体的体积是多少立方厘米．
<gadget id="calculator">80 / 4 / 4</gadget>
<output>5</output>

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

<gadget id="calculator">9 * 5 * 5</gadget>
<output>225</output>

<result>225</result>