A wire is formed into a rectangle with a length of 12 cm and a width of 6 cm. If it is made into a cube frame and the frame is wrapped in brown paper, how much brown paper is needed at least?
把一根铁丝围成一个长方形，长12厘米，宽6厘米．如果把它做成一个立方体框架，这个框架用牛皮纸包装起来，那么至少需要多少牛皮纸？
<gadget id="calculator">12 + 6</gadget>
<output>18</output>

<gadget id="calculator">2 / 12</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">18 * (1/6)</gadget>
<output>3</output>

<gadget id="calculator">3 * 3 * 6</gadget>
<output>54</output>

<result>54</result>