Well, there's 4 quarts in a gallon, so 1 gallon of water would equal 4 quarts of water.
We already know there are 4 quarts of lemon juice.
And there are 32 ounces in a quart, so that would equal 1 quart of honey.
So all you need to do now is add 4 quarts, 4 quarts, and 1 quart to get 9 quarts. You would get 9 quarts of lemonade.
I hope this helped you! :)