Use iron wires to surround three cuboid models whose length, width, and height are 6 decimeters, 4 decimeters, and 3 decimeters respectively. How many decimeters of iron wires are needed at least?
用铁丝围成长、宽、高分别是6分米、4分米、3分米的三个长方体模型，至少需要多少分米的铁丝？
<gadget id="calculator">6 + 4 + 3</gadget>
<output>13</output>

<gadget id="calculator">13 * 4 * 3</gadget>
<output>156</output>

<result>156</result>