You can easily calculate your watt-hours per mile using a $30 Kill-A-Watt meter from Amazon/Lowes/HD/Ace.
Or maybe this:
https://www.amazon.com/Upgraded-Brig..._source=1&th=1
If not, then use 120 watt-hours per mile or 2.5ah which is typical.
210ah / 2.5ah per mile = 84 miles of range.
The EZGO RXV Elite is quite efficient at about 85 watt-hours per mile.