This is a puzzle cache. Please put it back to reset so the next cacher can get the same experiance. I hope you enjoy the hand made puzzle.
Here is your clue to gain access to the log.
Add the top 3 numbers. Subtract the sum of the middle row from the sum of the top row. Multiply that result by the sum of the bottom row.
Easy Peasy. :) Please move the gears out of place after you put everything back.