If 3 small cubes with side lengths of 2 cm are put together to form a cuboid, the surface area of the cuboid is less than the sum of the surface areas of the 3 small cubes by how many square centimeters.
3个棱长是2cm的小正方体拼成一个长方体，长方体的表面积比3个小正方体表面积的和少多少平方厘米．
<gadget id="calculator">2 * 2 * 4</gadget>
<output>16</output>

<result>16</result>