The sum of the sides of a cuboid is 60 cm, and it is cut into three identical cubes. What is the volume of the original cuboid?
一个长方体棱长总和是60厘米，正好被切成了三个同样的正方体，原来长方体的体积是多少．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">8 + 12</gadget>
<output>20</output>

<gadget id="calculator">60 / 20</gadget>
<output>3</output>

<gadget id="calculator">3 * 3 * 3 * 3</gadget>
<output>81</output>

<result>81</result>