The volume of a cuboid is 42cm**3, its length, width and height are all prime numbers, find the surface area of the cuboid.
一个长方体的体积是42cm**3，它的长、宽、高都是质数，求长方体的表面积．
<gadget id="calculator">7 * 3</gadget>
<output>21</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">21 + 14 + 6</gadget>
<output>41</output>

<gadget id="calculator">41 * 2</gadget>
<output>82</output>

<result>82</result>