After gluing two cylindrical wooden sticks with a length of 1 meter and equal base diameters to form a long cylinder, the surface area is reduced by 6.28 square centimeters compared to the original one. What is the volume of the wooden sticks after gluing?
把两根长1米，底面直径相等的圆柱体木棒胶合成一根长圆柱体后，表面积比原来减少了6.28平方厘米，胶合后木棒的体积是多少立方厘米．
<gadget id="calculator">6.28 / 2</gadget>
<output>3.14</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">3.14 * 2 * 100</gadget>
<output>628</output>

<result>628</result>