A square piece of paper with a side length of 31.4 cm encloses the sides of a cylinder (the joints do not overlap), what is the radius of the base of the cylinder in cm
一个边长是31.4厘米的正方形纸片，围成一个圆柱体的侧面(接头处不重叠)，这个圆柱体的底面半径是多少厘米
<gadget id="calculator">31.4 / 3.14 / 2</gadget>
<output>5</output>

<result>5</result>