cylindrical wood with a length of 2 meters, after cutting off a section with a length of 2 decimeters, the surface area of the remaining cylindrical wood is reduced by 12.56 square decimeters, what is the volume of the original cylindrical wood?
一根长2米的圆柱形木料，截去2分米长的一段后，剩下的圆柱形木料的表面积比原来减少12.56平方分米，原来圆柱形木料的体积是多少．
<gadget id="calculator">12.56 / 2 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 2 * 10</gadget>
<output>62.8</output>

<result>62.8</result>