How many such small cubes are needed to form a large 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大的正方体，至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>