How to convert 864 feet to miles?
We know (by definition) that:
We can set up a proportion to solve for the number of miles.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 mile is equal to 6.11111111111111 times 864 feet.
It can also be expressed as: 864 feet is equal to miles.
An approximate numerical result would be: eight hundred and sixty-four feet is about zero point one six miles, or alternatively, a mile is about six point one one times eight hundred and sixty-four feet.
 The precision is 15 significant digits (fourteen digits to the right of the decimal point).Results may contain small errors due to the use of floating point arithmetic.