To draw a circle with a circumference of 6.28 cm, what is the distance between the two feet of the compass in cm?
要画一个周长是6.28厘米的圆，圆规两脚间的距离应该量多少厘米．
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<result>1</result>