A 120 cm long iron wire encloses a cuboid whose length, width and height ratio is 3:2:1. What is the volume of this cuboid?
把一根长120厘米的铁丝围成一个长、宽、高的比为3：2：1的长方体，这个长方体的体积为多少．
<gadget id="calculator">120 / 4</gadget>
<output>30</output>

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

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

<gadget id="calculator">30 * (1/2)</gadget>
<output>15</output>

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

<gadget id="calculator">30 * (1/3)</gadget>
<output>10</output>

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

<gadget id="calculator">30 * (1/6)</gadget>
<output>5</output>

<gadget id="calculator">15 * 10 * 5</gadget>
<output>750</output>

<result>750</result>