Use a 108 cm long iron wire to make a rectangular model, and the ratio of edge length is required to be 2:3:4. If each side is wrapped with iron sheets to make an iron box, how much iron sheet is needed at least?
用一条长108厘米的铁丝做成一个长方形模型，要求棱长的比为2：3：4．如果每个面都用铁皮包上做成铁盒，至少需要多少铁皮？
<gadget id="calculator">108 / 4</gadget>
<output>27</output>

<gadget id="calculator">2 + 3 + 4</gadget>
<output>9</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">27 * (1/3)</gadget>
<output>9</output>

<gadget id="calculator">27 * (2/9) * 9</gadget>
<output>54</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">27 * (2/9) * 27 * (4/9)</gadget>
<output>72</output>

<gadget id="calculator">9 * 27 * (4/9)</gadget>
<output>108</output>

<gadget id="calculator">54 + 72 + 108</gadget>
<output>234</output>

<gadget id="calculator">234 * 2</gadget>
<output>468</output>

<result>468</result>