There is a cuboid, the ratio of length to width is 2:1, the ratio of width to height is 3:2, and the surface area is 72cm**2, find the volume of this cuboid.
有一个长方体，长和宽的比是2：1，宽与高的比是3：2，表面积为72cm**2，求这个长方体的体积．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 * 3 * 3 * 3 * (2/3)</gadget>
<output>36</output>

<result>36</result>