Draw a circle with a circumference of 18.84 cm. What is the distance between the two feet of the compass in cm?
画一个周长18.84厘米的圆，圆规两脚距离应取多少厘米．
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<result>3</result>