A piece of cylindrical wood with a length of 2m is sawn into two small pieces of cylindrical wood, and the surface area is increased by 0.25m**2 compared with the original one. What is the original volume of this cylindrical wood in m**3.
把一段长2m的圆柱形木料，锯成两小段圆柱形木料，表面积比原来增加了0.25m**2，这根圆柱形木料原来的体积是多少m**3．
<gadget id="calculator">0.25 / 2</gadget>
<output>0.125</output>

<gadget id="calculator">0.125 * 2</gadget>
<output>0.25</output>

<result>0.25</result>