After a small cuboid with a length of 3 decimeters is cut off from a cuboid wooden block, the remaining part is just a cube. The surface area of the cube is 24 square decimeters less than the original cuboid. What is the volume of the original cuboid?
一个长方体木块截下一段长3分米的小长方体后，剩余部分正好是一个正方体，正方体的表面积比原来的长方体少24平方分米，原来长方体的体积是多少立方分米．
<gadget id="calculator">24 / 4 / 3</gadget>
<output>2</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">5 * 2 * 2</gadget>
<output>20</output>

<result>20</result>