A cuboid of wood is 4.5 meters long. It has a set of opposite faces that are square, and the total area of the other four is 7.2 square meters. Find the volume of this log.
一根长方体木料，长4.5米，它有一组相对的面是正方形，其余4个的总面积是7.2平方米．求这根木料的体积．
<gadget id="calculator">7.2 / 4 / 4.5</gadget>
<output>0.4</output>

<gadget id="calculator">0.4 * 0.4 * 4.5</gadget>
<output>0.72</output>

<result>0.72</result>