When you multiply fractions you multiply straight across. So you'd have 4*4 equals 16. Then you multiply the denominators: 5*5. This would give you 25. So then you have 16/25. It is simplified and cannot be reduced. So no multiplying 4/5 by 4/5 does not equal 4/5.
6:2 because there are 6 cups of flour and 2 cups of milk if u put the 2 first it means 2 cups to 6 cups and you need to answer it the exact way the it is asked I am in elementary school and I know this