What people do is that they start with the final answer they want to come to....in this case it's 666 or whatever...but as 666 is a well known fancy number, so that is what a lot of guys start with.

Once you know the final answer you want to end up at, the rest is easy....

All you have to do then is start to add up the numbers, and using a 'base 10" way of thinking, (or whatever base will get you the answer 666), just keep doing math until the sum total gets you to the answer you knew from the start...

and then?...

and then stop doing any more math...


QUESTION:
What would be a way to prove you actually are doing correct Bible math?

ANSWER:
That's easy, come up with an answer you don't know from the start.
predict a date that comes true and you have proved your math is correct.

But attempting to prove that you know how to do Bible math by simply adding numbers until you get to a final answer you knew from the start just is silly....proves nothing...and tends to be a self-delusion