Paint the surface of a cube red. Divide the cube into 64 equal small cubes.
一个正方体表面涂上红色，把这个正方体分成相等的64个小正方体，分开后，有多少个小正方体一个面都不涂色．
<gadget id="calculator">4 - 2</gadget>
<output>2</output>

<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>