Putting together three cubes with side lengths of 1cm into a cuboid, how much is the surface area reduced in cm**2.
把三个棱长是1cm的正方体拼成一个长方体，表面积减少了多少cm**2．
<gadget id="calculator">1 * 1 * 4</gadget>
<output>4</output>

<result>4</result>