If 5 small cubes with side lengths of 1 decimeter are put together to form a cuboid, the surface area is reduced by how many square decimeters.
把5个棱长为1分米的小正方体拼成一个长方体，表面积减少了多少平方分米．
<gadget id="calculator">1 * 1 * 8</gadget>
<output>8</output>

<result>8</result>