This multi will take you on a walk through a nice little park.
At your first stop there will be a plaque with a four digit number on it.
(Note :this plaque is flat on the ground so this may be hard to see in winter)
The four digits will represent (ABCD)
Your second location will be:
N44 56.(D X 3) (B X 2) 7
W93 2.(D - A) (A + B) 1
At the second location look for a silver disc with some writing on it. Look for "NB - ( E F)" E and F are your variables.
Your final location will be:
N44 57.(E - 9) (E - F) 8
W93 2.(E -F) (F - 3) 2