A rectangular parallelepiped frame is welded with steel bars, the height of the frame is 5dm, and the area of the bottom is a square with a perimeter of 12dm. How many decimeters of steel bar should be used to weld this cuboid at least? (interface not counted)
用钢筋焊一个长方体框架，框架高5dm，底面积是一个周长12dm的正方形．焊这个长方体至少要用钢筋多少分米？(接口处不计)
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">24 + 20</gadget>
<output>44</output>

<result>44</result>