After the height of a cuboid is reduced by 2 cm, the surface area is reduced by 40 cm2 and becomes a cube. What is the volume of the original cuboid?
一个长方体的高减少2厘米后，表面积减少了40平方厘米，变成了一个正方体．求原长方体的体积是多少？
<gadget id="calculator">40 / 4 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">5 * 5 * 7</gadget>
<output>175</output>

<result>175</result>