Use 1cm**3 small cubes to form a slightly larger cube, at least how many small cubes are needed.
用1cm**3的小正方体摆成稍大一些的正方体，至少需要多少个小正方体．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>