For a standard 400-meter runway, the width of each track is 1.25m, how many meters should the outer track be ahead of the starting line of the adjacent inner track.
标准的400米跑道，每道的宽度为1.25m，则外道比相邻内道的起跑线要提前多少米．
<gadget id="calculator">3.14 * 1.25</gadget>
<output>3.925</output>

<result>3.925</result>