Use 72 cm long iron wire to just make a rectangular parallelepiped frame. The ratio of length, width and height of the obtained cuboid is 3:2:1, what is the volume of the obtained cuboid?
用72厘米长的铁丝正好做成一个长方体的框架．所得长方体的长、宽、高的比是3：2：1，所得长方体的体积是多少？
<gadget id="calculator">72 / 4</gadget>
<output>18</output>

<gadget id="calculator">1 + 2 + 3</gadget>
<output>6</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">18 * (1/6) * 6 * 18 * (1/2)</gadget>
<output>162</output>

<result>162</result>