If the height of a cuboid is increased by 4 cm, it becomes a cube. At this time, the surface area is increased by 80 cm2. What is the volume of the original cuboid?
一个长方体如果高增加4厘米就变成一个正方体，这时表面积比原来增加80平方厘米，原来的长方体体积是多少．
<gadget id="calculator">80 / 4 / 4</gadget>
<output>5</output>

<gadget id="calculator">5 * 5 * 5</gadget>
<output>125</output>

<result>125</result>