A 10-meter-long cylindrical piece of wood is cut into three sections, and the surface area increases by 1.2 square decimeters. What is the original volume of the wood in cubic decimeters?
把一根10米长的圆柱形的木料截成三段，表面积增加了1.2平方分米，这根木料原来的体积是多少立方分米．
<gadget id="calculator">1.2 / 4</gadget>
<output>0.3</output>

<gadget id="calculator">0.3 * 10 * 10</gadget>
<output>30</output>

<result>30</result>