A cuboid, if its height is reduced by 2.5 cm, it becomes a cube, and its surface area is reduced by 40 cm2. What is the volume of the original cuboid?
一个长方体，如果把它的高减少2.5厘米后就变成一个正方体，表面积比原来减少40平方厘米，原来长方体的体积是多少立方厘米？
<gadget id="calculator">40 / 4 / 2.5</gadget>
<output>4</output>

<gadget id="calculator">4 + 2.5</gadget>
<output>6.5</output>

<gadget id="calculator">4 * 4 * 6.5</gadget>
<output>104</output>

<result>104</result>