Okay, first of all you must open all floors, for easy access.
This method is easily done with one player, since more than one player will get quite annoying.
the order from top, to bottom is 2 7 4 6. to do this, you must first put the top on 2.
then go to the floor below (3rd floor), and check what number it is, once checked you must count the number of turns required to get it to 7, note: do not turn the dial on this floor yet!!
After completing this, go to the 2nd floor up and turn the dial until the 2nd floor's dial is at 7, note: this will NOT get this floor's dial to the correct digit.
After doing this, you must put the bottom floor's dial to 6.

Now, go back up a floor and check how many turns it is away from 4 (just like you already have done previously).
once you have figured out the number of turns, go up to the 3rd floor and turn it until floor 2's dial is at 4.
And finally, get to the top floor and turn it to 2, this WILL get the dials to the required order - 2 7 4 6

Thanks for viewing, i hope this helps you