31. The oldest teacher at the Ocean School is the Turtle Teacher, who says: “Our class, including Nemo, has a total of 10 little fish, and each little fish is the same age as Nemo. Nemo's father is exactly 5 times as old as Nemo. If we add up the ages of all the students in our class and then add Nemo's father's age, it equals my age.” The Turtle Teacher's age is \qquad times Nemo's father's age.
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