1. you can try to figure out how many years if for 1 g of protein, so I divided 60g from 165 lbs.
165/60=2.75
which means that you need 1 g for every 2.75 years
2. then you times 220 by 2.75 to get you how many grams you need
220*2.75=80
3. so he would need 80g per day
