To draw a circle with a circumference of 12.56 cm, what is the distance between the two feet of the compass in cm?
要画一个周长是12.56厘米的圆，则圆规两脚之间的距离应是多少厘米．
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<result>2</result>