Use three cuboids with a length of 3 cm, a width of 2 cm, and a height of 1 cm to form a cuboid with the smallest surface area. What is the surface area of this large cuboid.
用3个长3厘米、宽2厘米、高1厘米的长方体，拼成一个表面积最小的长方体．这个大长方体的表面积是多少．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

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

<gadget id="calculator">6 + 9 + 6</gadget>
<output>21</output>

<gadget id="calculator">21 * 2</gadget>
<output>42</output>

<result>42</result>