A piece of rectangular paper with a length of 6.28 decimeters and a width of 3.14 decimeters, if it is used as a side, then a circular piece of paper with the following radius of decimeters can be made into a cylinder with it.
一张长方形纸，长6.28分米，宽3.14分米，如果以它为侧面，那么以下半径多少分米的圆形纸片能和它配成圆柱体．
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<result>1</result>