Use 6.28 cm long iron wire to form the largest circle. To draw this circle, how many centimeters should be the distance between the two feet of the compass.
用6.28厘米长的铁丝围成一个最大圆形，要画这个圆，圆规两脚间的距离应取多少厘米．
<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>