Use small cubes with a volume of 1 cubic centimeter to assemble a larger cube, how many such small cubes are needed at least.
用体积是1立方厘米的小正方体拼成一个比它大的正方体，最少需要多少个这样的小正方体．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>