Use iron wire to make a cuboid frame with a length of 5dm, a width of 4dm, and a height of 3dm, at least how much dm of iron wire is needed. (excluding interface)
用铁丝做一个长5dm，宽4dm，高3dm的长方体框架，至少需要铁丝多少dm．(不计接口)
<gadget id="calculator">5 + 4 + 3</gadget>
<output>12</output>

<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<result>48</result>