What is the minimum surface area of a cuboid made of 4 small cubes with a volume of 1cm**3?
用4个体积是1cm**3的小正方体拼成一个长方体，表面积最小是多少．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">4 + 2 + 2</gadget>
<output>8</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>