If a cuboid is twice as long as it is wide, twice as wide as it is high, and the sum of the lengths of all sides is 56, what is the volume of the cuboid?
若一个长方体，长是宽的2倍，宽是高的2倍，所有棱长之和是56，则此长方体的体积是多少．
<gadget id="calculator">1 + 2 + 4</gadget>
<output>7</output>

<gadget id="calculator">56 / 4 / 7</gadget>
<output>2</output>

<gadget id="calculator">2 * 2 * 2 * 2 * 2 * 2</gadget>
<output>64</output>

<result>64</result>