A cuboid becomes a cube if its height is reduced by 5 centimeters, and its surface area is reduced by 100 square centimeters. What is the volume of this cuboid?
一个长方体，如果把它的高减少5厘米，就成为一个正方体，此时表面积比原来减少100平方厘米．这个长方体的体积是多少？
<gadget id="calculator">100 / 4 / 5</gadget>
<output>5</output>

<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<gadget id="calculator">5 * 5 * 10</gadget>
<output>250</output>

<result>250</result>