It is recommended: 0.8 g for every 1 kg of body weight ( at BMR - Basal Metabolic Rate or with a little exercise ):
1 kg ≈ 2.2 pounds
180 pounds : 2.2 = 81.82 kg
81.82 · 0.8 = 65.5 ≈ 66 g
Answer:
66 g proteins are his daily needs ( remark: it is more if he is active in sports ).
