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189.560 shackles is about one-and-three-tenths times as long as The Indianapolis Motor Speedway.
In other words, it's 1.292450 times the length of The Indianapolis Motor Speedway, and the length of The Indianapolis Motor Speedway is 0.7737240 times that amount.
(Speedway, Indiana) (rectangular oval course)
The rectangular oval course of the Indianapolis Motor Speedway is 146.6670 shackles. While famous for its automotive racing, the first motorsport held at the track was a series of motorcycle races in August, 1909 — a little less than two years before the inaugural Indianapolis 500 race was run.
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