'Eighty' in the Bible

And Methuselah lived an hundred eighty and seven years, and begat Lamech:

And Methuselah lived after he begat Lamech seven hundred eighty and two years, and begat sons and daughters:

And Lamech lived an hundred eighty and two years, and begat a son:

and Abram is a son of eighty and six years in Hagar's bearing Ishmael to Abram.

And the days of Isaac are a hundred and eighty years,