Draw a circle with a circumference of 12.56 cm. What is the distance between the two feet of the compass in cm?
画一个周长是12.56厘米的圆，圆规的两脚之间的距离应该是多少厘米．
<gadget id="calculator">12.56 / 6.28</gadget>
<output>2</output>

<result>2</result>