Draw a circle with a circumference of 12.56 cm. What is the distance between the legs of the compass in cm?
画一个周长为12.56厘米的圆，圆规两脚叉开的距离为多少厘米．
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<result>2</result>