Use iron wire to form a cuboid model with a length of 6 decimeters, a width of 4 decimeters, and a height of 5 decimeters. How many decimeters of iron wire are needed at least?
用铁丝围成一个长6分米，宽4分米，高5分米的长方体模型，至少需要多少分米铁丝？
<gadget id="calculator">6 + 4 + 5</gadget>
<output>15</output>

<gadget id="calculator">15 * 4</gadget>
<output>60</output>

<result>60</result>