" .I don't know how it can possibly be calculated. No, honestly, I really don't."
That is what I was saying in my earlier Post, to take as true the time periods given by Bible Writers is naive and ignorant. As many Posts on here in years past have shown, by erudite people like " Peaceful Pete" and " Leolaia", we are dealing with literature here of various genres, none of which are history in any sense we would recognise.
So even when a seemingly specific period like "430 years" or whatever is spoken of, this is often for literary reasons, and rarely accurate. It can't be done, apart from very generally, we can say things like the Bible seems to place the Story of so-and-so in such and such a period. this as close as we can get !