There is a cuboid with a length of 30 cm, the ratio of length to width is 2:1, and the ratio of width to height is 3:2, what is the volume of this cuboid?
有一个长方体，长30厘米，长与宽的比是2：1，宽与高的比是3：2，这个长方体体积是多少？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">15 * (2/3)</gadget>
<output>10</output>

<gadget id="calculator">30 * 15 * 10</gadget>
<output>4_500</output>

<result>4_500</result>