A 30-decimeter-long cylindrical wooden strip, after being cut into two cylinders, the surface area increases by 25.12 square decimeters, what is the original volume of the wooden strip in cubic decimeters
一根30分米长的圆柱形木条，截成两段圆柱体后表面积增加了25.12平方分米，原来木条的体积是多少立方分米
<gadget id="calculator">25.12 / 2</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 * 30</gadget>
<output>376.8</output>

<result>376.8</result>