On a circular runway, the fourth starting line is 18.84 meters ahead of the first starting line, so how many meters is the distance between the center line of the fourth track and the center line of the first track?
在环形跑道上，第四道起跑线比第一道起跑线靠前了18.84米，则第四道的中线与第一道的中线间的距离是多少米？
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<result>3</result>