A 3-meter-long cuboid is divided into three sections on average, and the surface area increases by 2.4 square decimeters. What is the volume of this wood in cubic decimeters?
把一根长3米的长方体木料，平均剧成三段，表面积增加了2.4平方分米，这根木料的体积是多少立方分米．
<gadget id="calculator">2.4 / 4</gadget>
<output>0.6</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">0.6 * 30</gadget>
<output>18</output>

<result>18</result>