If max delivers 8,520 mail a year how much mail does max deliver in 2 months

he deliver 1420 mails in 2 months

Max delivers 4260 every 2 months because if you divide 2 and 8 you get 4 then divide 5 and 2 you get 2 with 1 left then you bring down the 2 and when you bring down the 2 you get 12 the divide 12 by 2 is 6 then you have 0 and when you divide 0 by 0 you get 0.