The cache is not at the given coordinates. Not only must you solve the puzzle, you must use the same key to find 3 more digits you will need to open the cache.
Find the cache at
N (Germany + Spain + Brazil - Argentina - France) degrees Italy. (South Africa x South Africa) + Germany + England + Spain
W (Spain - France) degrees (Brazil - Italy). (Uruguay + Italy + France + Spain + England + Brazil + Argentina)
Key = (Uruguay/2) - Argentina