If you put four cubes of wood whose sides are 1 cm long to form a cuboid, what is the minimum surface area of the cuboid?
把四个棱长是1厘米的正方体木块，拼成一个长方体，拼成的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>