5 minutes ... 200 yards
x minutes = ? ... 2 miles = 3520 yards
To convert 2 miles to yards, you have to multiply 2 by 1760, because 1 mile equals to 1760 yards: 2 * 1760 = 3520 yards.
If you would like to know how long does it take to clean up 2 miles, you can calculate this using the following steps:
5 * 3520 = 200 * x
17600 = 200 * x /200
x = 17600 / 200
x = 88 minutes
Result: It will take 88 minutes.