Go to the place where coordinates point. Look at the house and calculate the number of the letters on the grey wall (those big ones). Let this number be C. The A and B values you can retrieve from the https://coord.info/GC9WNYY
The cache is located at: N60° 12.xxx, E024° 39.yyy
xxx = A+3*C-4
yyy = B
Take your swimming suit with you if you have extra time.