Use a compass to draw a circle with a circumference of 31.4 cm. What is the distance between the two toes?
用圆规画一个周长是31.4厘米的圆，两脚尖张开的距离是多少厘米．
<gadget id="calculator">31.4 / 3.14 / 2</gadget>
<output>5</output>

<result>5</result>