It doesn't work that way. FAFSA doesn't pay anything.
Each college takes the EFC that the FAFSA formula calculates, and uses it to create a financial aid package (grants, loans, work study) that meets much of the difference between the EFC and the Cost of Attendance. Each college is different, and there are too many variables involved to answer your question.
You can go to College Board and look up your college and find out what % of need they meet, on average, and find out what the average breakdown of grants/loans/work study is.