Use an iron wire to form a cuboid frame with a length of 5.5 decimeters, a width of 3.5 decimeters, and a height of 4 decimeters. What is the length of this iron wire in decimeters?
用一根铁丝围成一个长5.5分米，宽3.5分米，高4分米的长方体框架，这根铁丝长多少分米．
<result>42</result>