child is going to use several small cubes with a side length of 1 cm to make a big cube. He needs at least as many of these small cubes to make a big cube.
一个小朋友准备用若干个棱长1厘米的小正方体堆成一个大的正方体，他至少需要多少个这样的小正方体就可以堆成一个大的正方体．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>