Draw a circle with a circumference of 12.56 cm, what is the distance in cm between the two feet of the compass.
画一个周长是12.56cm的圆，圆规两脚之间的距离是多少cm．
<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">12.56 / 6.28</gadget>
<output>2</output>

<result>2</result>