Weld a cuboid model with a ratio of length, width and height of 3:2:1 with iron wire. If its height is 2 decimeters, how many decimeters of wire are needed to weld such a model.
用铁丝焊接一个长、宽、高的比是3：2：1的长方体模型．如果它的高是2分米，那么焊接这样一个模型需要铁丝多少分米．
<gadget id="calculator">3 + 2 + 1</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2 / (1/6)</gadget>
<output>12</output>

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

<result>48</result>