Find the numbers in Pi again Mystery Cache

As you should know, DO NOT GO TO THE POSTED LOCATION, you must solve the puzzle to find the correct place to go to and start your search.

N DK AG.MBO W CIE NF.JHL

To solve the puzzle, find the listed number in Pi and exchange the letter for the number in the puzzle. 

Example: What is the 3^rd number/digit?  (Pi - 3.1415)  The answer is 4.

Example: What is the 3rd Fractional number/digit?  (Pi - 3.1415)  The answer is 1.

41st Fractional number – 2nd number = A

69th number + 49th Fractional number = B

51st number + 65th Fractional number = C

21^st Fractional number = D

38th number + 72nd number + 40th Fractional number = E

50th Fractional number + 97th Fractional number + 50th number = F

86th Fractional number – 92nd number = G

41st number + 94th Fractional number + 206th Fractional number = H

11th Fractional number = I

251st Fractional number = J

12^th number = K

272nd Fractional number = L

144^th Fractional number = M

40th Fractional number + 38th number + 72nd number = N (not the first N in the puzzle)

91^st Fractional number = O