If 3 cubes with sides of 2 decimeters are put together to form a cuboid, the surface area of the cuboid is reduced by how many square decimeters compared with the sum of the surface areas of the original 3 small cubes.
把3个棱长都是2分米的正方体拼成一个长方体，长方体的表面积比原来3个小正方体的表面积和减少了多少平方分米．
<gadget id="calculator">2 * 2 * 4</gadget>
<output>16</output>

<result>16</result>