Small cubes with an edge length of 1 cm can be assembled into a larger cube. At least how many of these small cubes are needed to form a cube.
棱长为1厘米的小正方体块拼成一个较大的正方体，至少要多少个这样的小木块才能拼成一个正方体．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>