A cylindrical piece of wood is 2 meters long. If it is cut into two pieces, the surface area increases by 50 square centimeters. What is the original volume of the wood in cubic centimeters?
一根圆柱形木料长2米，把它截成两段，表面积增加了50平方厘米，原来木料的体积是多少立方厘米．
<gadget id="calculator">50 / 2</gadget>
<output>25</output>

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

<gadget id="calculator">25 * 200</gadget>
<output>5_000</output>

<result>5_000</result>