A cuboid whose height is reduced by 5cm becomes exactly a cube. The surface area of this cube is reduced by 240cm**2. What is the volume of the original cuboid in cubic centimeters?
一个长方体，高减少5cm，恰好成为一个正方体，这个正方体的表面积比原来长方体减少了240cm**2．原来长方体的体积是多少立方厘米？
<gadget id="calculator">240 / 4 / 5</gadget>
<output>12</output>

<gadget id="calculator">12 + 5</gadget>
<output>17</output>

<gadget id="calculator">12 * 12 * 17</gadget>
<output>2_448</output>

<result>2_448</result>