To assemble a cube with a volume greater than 1dm**3, how many cubes with a volume of 1dm**3 should be used at least.
拼一个体积大于1dm**3的正方体，至少要用多少个体积是1dm**3的正方体．
<gadget id="calculator">2 ** 3</gadget>
<output>8</output>

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

<result>8</result>