After cutting a cylindrical wood with a length of 2m into 3 sections along the cross-sectional direction, the surface area increases by 12.56 square decimeters compared with the original one. What is the volume of the original cylinder?
把一根长2m的圆柱形木料沿横截面方向截成3段后，表面积比原来增加了12.56平方分米，原来圆柱体的体积是多少．
<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">3.14 * 20</gadget>
<output>62.8</output>

<result>62.8</result>