In The Light Fantastic only one individual can save the world
from a disastrous collision. Unfortunately, the hero happens to be
the singularly inept wizard Rincewind, who was last seen falling
off the edge of the world...
Rincewind, his companion Twoflower the naive tourist, and
Twoflower's aggressive luggage (a sapient pearwood box that trots
around on hundreds of tiny legs), now find themselves safe back on
the Disc--thanks to the Octavo, the highly magical repository of
the Eight Great Spells. One of the spells has taken up residence in
Rincewind's head (""The spell wasn't a demanding lodger. It just
sat there like an old toad at the bottom of a pond""), and so most
of the Disc's wizards are chasing after Rincewind to try and get
the spell back. The rest is riotously impossible to summarize but
includes warrior princesses, Cohen the Barbarian, trolls, demons,
Death, Druids, false teeth, argumentative spells, flying rocks, and
talking trees.
The cache is not located at the above co-ordinates, but can be
found within a mile of them.
The true cache Northings are given by A
The true cache Westings are given by B
Where C divided by A = 59.33007927
and C divided by B = 5146.828355
A correct solution of the puzzle will give you a checksum (total
of all 15 digits) equal to 62