If the height of a cuboid is reduced by 2 cm, a cube is obtained. It is known that the surface area of the cube is reduced by 40 cm2. What is the volume of the original cuboid?
一个长方体的高减少2cm就得到一个正方体，已知正方体表面积减少40平方厘米，求原来长方体体积是多少？
<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>