The ratio of the length, width, and height of a cuboid is 2:1:3, and the sum of all edge lengths is 72 decimeters. What is the volume of this cuboid.
一个长方体长、宽、高的比是2：1：3，且所有棱长和为72分米．这个长方体的体积是多少．
<gadget id="calculator">72 / 4</gadget>
<output>18</output>

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

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

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

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

<gadget id="calculator">(1/6) / 6</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">18 * (1/36)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">18 * (1/3) * 18 * (1/6) * 18 * (1/2)</gadget>
<output>162</output>

<result>162</result>