Use two cuboids with a length of 6 cm, a width of 3 cm, and a height of 1 cm to form a cube with the smallest possible surface area. What is the surface area of the assembled cuboid in square centimeters?
用两个长6厘米，宽3厘米，高1厘米的长方体拼成一个表面积尽可能小的正方体，这个拼成的长方体的表面积是多少平方厘米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

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

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

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

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

<result>72</result>