A cylindrical wood with a length of 3 meters is cut into 4 sections on average, and the surface area increases by 12 square decimeters. What is the volume of this wood in cubic decimeters?
一根长3米的圆柱形木料，平均截成4段后，表面积增加了12平方分米，原来这根木料的体积是多少立方分米．
<gadget id="calculator">12 / 6</gadget>
<output>2</output>

<gadget id="calculator">2 * 3 * 10</gadget>
<output>60</output>

<result>60</result>