A cuboid piece of wood is 4.5 meters long. It has a set of opposite sides that are square, and the total area of the remaining 4 sides is 7.2 square meters. What is the volume of this piece of wood?
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个面的总面积是7.2平方米，这根木料的体积是多少？
<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>