Question 53821
went down 1800 units ~> -1800
went left, right, or who knows ~> 3.25
1800/3.25 ~> 180,000/325 ~> 36,000/65 ~> 7,200/13 ~> something like 553.85 ft/mi
I did not use a calculator, so I could be wrong. Don't forget to check!