Find how many 1/4 inches are in 3 3/4 inches:
There are four 1/4 inches per inch.
3 inches x 4 = 12, there are twelve 1/4 inches in 3 inches and there are three 1/4 inches in 3/4 inch.
So there are a total of fifteen 1/4 inches in 3 3/4.
Now multiply the total 1/4 inches by 2 miles.
15 x 2 = 30 miles total.