A 2m long cylindrical steel is sawed into two small cylinders, the surface area is increased by 6.28cm**2, what is the volume of the original cylindrical steel in cm**3.
把一根长2m的圆柱形钢材锯成两段小圆柱，表面积增加6.28cm**2，原来圆柱形钢材的体积是多少cm**3．
<gadget id="calculator">6.28 / 2</gadget>
<output>3.14</output>

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

<gadget id="calculator">3.14 * 200</gadget>
<output>628</output>

<result>628</result>