A cylindrical wood with a length of 2 meters is sawed into two small cylinders, and the surface area increases by 25.12 square centimeters compared to the original one. What is the original volume of this piece of wood in cubic centimeters?
一根长2米的圆柱形木材，把它锯成2个小圆柱后，表面积比原来增加25.12平方厘米．这根木材原来的体积是多少立方厘米．
<gadget id="calculator">25.12 / 2</gadget>
<output>12.56</output>

<gadget id="calculator">2 * 100</gadget>
<output>200</output>

<gadget id="calculator">12.56 * 200</gadget>
<output>2_512</output>

<result>2_512</result>