Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: There are 15 x 4 = 60 slices of bread in 4 loaves of bread. Hence, each of them ate 60 / 10 = 6 slices of bread.
The question and answer:
A loaf of bread was sliced into 15. Ten friends bought 4 loaves of bread. If they all eat all 4 loaves equally, how many slices of bread did each of them eat?
The answer is 6