alt Hacker NewsAn adult who weighs 75 kg, so is targeting about 75 grams of protein intake per day, would only need to eat 833 grams of cooked chickpeas (which are 9% protein by weight) to get there. That is indeed a lot of chickpeas! But a lot less than you claimed, and you probably shouldn't be getting all your protein from chickpeas anyway.
You're probably talking about dry weight. My can says 6g protein / 130 g. I'm about 100kg and to hit the 1.6 g protein/kg I need 160g of protein. 6g/130g * 3500 g is 161 g of protein.