How many small cubes are needed to assemble a larger cube from small cubes with side lengths of 1 cm?
用棱长1厘米的小正方体，拼成一个较大的正方体，至少需要多少个小正方体．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>