If a cuboid is reduced by 2 centimeters, it becomes a cube, and its surface area is reduced by 72 square centimeters. What is the volume of the original cuboid?
一个长方体，把它的高减少2厘米就成了正方体，表面积比原来减少了72平方厘米，那么原来长方体的体积是多少．
<gadget id="calculator">72 / 4 / 2</gadget>
<output>9</output>

<gadget id="calculator">9 + 2</gadget>
<output>11</output>

<gadget id="calculator">9 * 9 * 11</gadget>
<output>891</output>

<result>891</result>