Use a compass to draw a circle with a circumference of 18.84 decimeters. What is the distance between the two feet of the compass in decimeters?
用圆规画一个周长为18.84分米的圆，圆规两脚间的距离应该是多少分米．
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<result>3</result>