A circle with a circumference of 6.28 cm is the distance between the two legs of the compass in cm.
一个周长是6.28厘米的圆，圆规两脚之间的距离是多少厘米．
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<result>1</result>