A cuboid, if its length is reduced by 2 cm, becomes a cube, and the surface area of the cube is reduced by 56 cm2 from the surface area of the original cuboid. Find the volume of the original cuboid.
一个长方体，若将它的长减少2厘米，就变成一个正方体，这个正方体的表面积比原来长方体的表面积减少了56平方厘米．求原来长方体的体积．
<gadget id="calculator">56 / 4 / 2</gadget>
<output>7</output>

<gadget id="calculator">7 + 2</gadget>
<output>9</output>

<gadget id="calculator">7 * 7 * 9</gadget>
<output>441</output>

<result>441</result>