A cylinder is unfolded sideways, and the length is 6.28 cm, and the width is 3.14 cm. What is the radius of the bottom of the cylinder?
把一个圆柱体侧面展开，量得长是6.28厘米，宽是3.14厘米，这个圆柱体底面半径是多少．
<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 / 6.28</gadget>
<output>1</output>

<result>1</result>