If two cubes with an edge length of 3 cm are put together to form a cuboid, how much less is the surface area of the cuboid than the sum of the surface areas of the two cubes?
将两个棱长3厘米的正方体拼成一个长方体，这时的长方体表面积比两个正方体的表面积之和少多少？
<gadget id="calculator">3 * 3 * 4</gadget>
<output>36</output>

<result>36</result>