A cylinder of steel is 9 decimeters long. If it is cut into 3 equal sections along the direction parallel to the bottom, the surface area will increase by 12.56 square decimeters. What is the volume of each small cylinder after cutting it in cubic decimeters?
一根圆柱体钢材长9分米，如果沿着与底面平行的方向，将它切成相等的3段，表面积就增加了12.56平方分米．切开后每个小圆柱的体积是多少立方分米．
<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">3.14 * 3</gadget>
<output>9.42</output>

<result>9.42</result>