There is a 200m oval track and field track, the straight track is 50m long, and each track is 1.2m wide. If a 100m race is run on this track, how to determine the starting line of the 100m track?
有一个200m的椭圆形田径跑道，直道长50m，每条跑道宽为1.2m，如果在这个跑道上进行100m赛跑，如何确定100m跑道的起跑线呢？
<gadget id="calculator">3.14 * 1.2</gadget>
<output>3.768</output>

<result>3.768</result>