After cutting a small cuboid with a height of 3 cm from a cuboid block, the remaining part is exactly a cube. The surface area of the cube is 24cm**2 less than that of the original cuboid. What is the volume of the original cuboid block?
从一个长方体木块上截下一段高3cm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24cm**2，原来长方体木块的体积是多少？
<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>