The circle of the school sports field is 200 meters, and the road width is 1.25 meters. For a 200-meter race, how many meters should the starting line advance in turn?
学校运动场一圈为200米，道宽为1.25米．一项200米的比赛，起跑线该依次提前多少米．
<gadget id="calculator">2.5 * 3.14</gadget>
<output>7.85</output>

<result>7.85</result>