Use a compass to draw a circle with a circumference of 31.4 cm. What is the distance between the two toes of the compass in cm?
用圆规画一个周长为31.4厘米的圆，圆规两脚尖张开的距离是多少厘米．
<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">31.4 / 6.28</gadget>
<output>5</output>

<result>5</result>