How many pieces are needed to arrange several square pieces of 1 cubic centimeter into a smallest cube (not including one piece).
将若干个1立方厘米的正方形木块，摆成一个最小的正方体(不包括一块)至少需要多少块块．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>