After a cuboid wooden block cuts off a small cuboid with a length of 2dm, the remaining part is just a cube. The surface area of the cube is 24dm**2 less than the original cuboid. Find the volume of the original cuboid?
一个长方体木块截下一段长2dm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24dm**2，求原来长方体的体积？
<gadget id="calculator">24 / 4 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">5 * 3 * 3</gadget>
<output>45</output>

<result>45</result>