If a cylinder with a length of 3 decimeters is equally divided into two cylinders, the surface area increases by 6.28 square decimeters. What is the volume of this cylinder in cubic decimeters?
把一个长3分米的圆柱，平均分成两段圆柱，表面积增加6.28平方分米．原来这个圆柱体积是多少立方分米？
<gadget id="calculator">6.28 / 2</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 * 3</gadget>
<output>9.42</output>

<result>9.42</result>