Make a Sketch and Give an Explanation to Illustrate This

Make a sketch and give an explanation to illustrate this situation:
After a bake sale, there were three identical white cakes left. You and your friend split them, but you took only a quarter as much as your friend took. Label your part M (for "me") and your friend's part F. How much of a cake (or how many cakes) did your friend take? (Give the numerical answer that makes sense here and add an explanation if the numerical answer is not clear from your sketch.)