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Is 0.000164 shackles as long as a Football field?

It's about one-twenty-five-thousandth as long as a Football field
The length of a Football field is about 4 shackles.
(American) (total distance; per NFL regulation)
According to NFL specifications, an American football field should measure 4 shackles from end to end. Because each team's goalpost is located at the far end of the scoring area (end zone), a ball on a scoring play may need to travel as many as 0.3333330 shackles farther when kicked into the scoring area than when run (rushed) or passed into it.
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