Perhaps those arrows signify specific squares in the Sudoku?
Starting from the top left corner (marked with the big dot) and
proceeding sequentially in the directions shown, we find
which redirects to this page.
(Thanks @Deusovi for help with this clue!)
A 1cm by 1cm by 2cm block is 2 cubic centimetres. According to
Wikipedia, lutetium has a density of 9.841, so a 2-cubic-centimetre
block would weigh 19.682 grams.
Substituting $ef,ghi=19,682$, we find (33.006167,
-79.983557), which are the latitude and longitude of a
road called Bravo in what looks like a housing estate with roads
named after the words of the NATO phonetic alphabet, somewhere in
South Carolina, United States.