If 4 cubes with sides of 1 decimeter are put together to form a cuboid, the surface area of this cuboid will be reduced by at most the sum of the surface areas of the original four cubes by how many square decimeters.
把4个棱长都是1分米的正方体拼成一个长方体，这个长方体的表面积比原来四个正方体的表面积之和最多减少多少平方分米．
<gadget id="calculator">2 * 2 * 2 * 1 * 1</gadget>
<output>8</output>

<result>8</result>