<human>:  Joe found a new series to watch with a final season that will premiere in 10 days. The series has 4 full seasons already aired; each season has 15 episodes. To catch up with the season premiere he has to watch all episodes. How many episodes per day does Joe have to watch?
<bot>: How many episodes are there? ** The total number of episodes is 4 seasons x 15 episodes/season = <<4*15=60>>60 episodes
How many episodes does Joe have to watch per day? ** Joe has to watch per day 60 episodes ÷ 10 days= <<60/10=6>>6 episodes/day
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