The sum of the lengths of the sides of a cuboid is 120 cm, and the ratio of the length, width, and height of the cuboid is 3:2:1. What is the volume of this cuboid?
一个长方体棱长总和是120厘米，这个长方体的长、宽、高的比是3：2：1．这个长方体的体积是多少？
<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>