Med math question. How much iron is baby getting per 24 hours

Ok help. I’m a new mom and just a high school graduate and I’m filling out paperwork for my kids pediatrician and it’s asking how much iron he consumes in 24hours. I can’t for the life of me figure this out. I’ve divided multiplied stuff and not getting anything that makes sense. I’m sleep deprived so please be kind. The formula container says the iron content per 5oz is 1.8mg. Baby drinks 6 4oz bottles in 24 hours. Can someone help me calculate this PLEASE.