If two cubes with side lengths of 5 decimeters are connected to form a cuboid, the surface area of the cuboid is reduced by how many square decimeters.
把两个棱长5分米的正方体木块连接成一个长方体，这个长方体的表面积比原来减少了多少平方分米．
<gadget id="calculator">5 * 5 * 2</gadget>
<output>50</output>

<result>50</result>