At the listing coordinates you found a map of Gibraltar
There is something written in gold. What?
A=How many "a" in gold?
B=How many "e" in gold?
C=How many "l" in gold?
D=How many "o" in gold?
E=How many "r" in gold?
F=How many "t" in gold?
If you stand before the map: turn left and go AxBxCxD+B+C+D+E+F meters - watch out for traffic!
Then turn left and go AF meters - and you find the final box
Alternativ you can calculate the Final:
N 36° 9. [E] 0 [(DxE+C)/A]
W 5° 20. [(AxCxExF+E)/B] [0] [(AxCxE+B)/F]