At least how many (except 1) small cubes are needed to form a slightly larger cube.
至少要多少个(1个除外)正方体小木块才能拼成一个稍大的正方体．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<gadget id="calculator">1 * 1 * 1</gadget>
<output>1</output>

<gadget id="calculator">8 / 1</gadget>
<output>8</output>

<result>8</result>