There is a 9-meter-long iron wire, cut off (4/5) to make a cube frame, and then wrap a layer of iron sheet on the surface of the cube, what is the volume of the cube in cubic meters?
有一根长9米的铁丝，剪下它的(4/5)做成一个正方体框架，再在这个正方体的表面包一层铁皮，这个正方体的体积是多少立方米．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">9 * (4/5)</gadget>
<output>36/5 = around 7.2</output>

<gadget id="calculator">(36/5) / 12</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * (3/5) * (3/5)</gadget>
<output>27/125 = around 0.216</output>

<result>27/125 = around 0.216</result>