In order to meet the "June 1st", the school's logistics department asked the carpenter to saw a 2-meter-long cylinder of wood into three small cylinders for performances. The total surface area after sawing increased by 12.56 square decimeters compared with the original. What is the volume of this piece of wood in cubic decimeters?
为了迎接"六一"，学校后勤部让木工师傅把一根长2米的圆柱体木材，锯成3段小圆柱，以备表演，锯开后的表面积总和比原来增加了12.56平方分米，原来这根木材的体积是多少立方分米．
<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 * 2 * 10</gadget>
<output>62.8</output>

<result>62.8</result>