How many small cubes are needed to form a large cube with sides of 4 cm from small cubes with side lengths of 1 cm?
用棱长1cm的小正方体木块拼成一个棱长4cm的大正方体，至少需要多少个小正方体．
<gadget id="calculator">4 * 4 * 4</gadget>
<output>64</output>

<result>64</result>