A cylindrical piece of wood is 2 meters long. After cutting it into 3 equal sections, the surface area increases by 12.56 square meters. What is the volume of this cylinder in cubic meters?
一根圆柱形木材长2米，把它截成相等的3段后，表面积增加了12.56平方米．这根圆柱的体积是多少立方米？
<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<result>6.28</result>