If two cubes with side lengths of 2 decimeters are put together to form a cuboid, the surface area of the cuboid is reduced by the sum of the surface areas of the two cubes by how many square decimeters.
把两个棱长都是2分米的正方体拼成一个长方体，这个长方体的表面积比两个正方体的表面积的和减少了多少平方分米．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<result>8</result>