Use 6 cuboids whose length, width and height are 3, 2 and 1 centimeters to form a big cuboid, what is the minimum surface area of the big cuboid in square centimeters
用6个长、宽、高分别为3、2、1厘米的长方体拼成一个大长方体，则大长方体的表面积最小为多少平方厘米
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<gadget id="calculator">6 + 18 + 12</gadget>
<output>36</output>

<gadget id="calculator">36 * 2</gadget>
<output>72</output>

<result>72</result>