Question
Carl is watching an orchestral performance in a concert hall. There are 21 seats to his right and 30 seats to his left. There are 41 rows of seats in front of him and 57 rows behind him. There are an equal number of seats in each row. What is the total number of seats in the concert hall?
4 m

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Carl is watching an orchestral performance in a concert hall. There are 21 seats to his right and 30 seats to his left. There are 41 rows of seats in front of him and 57 rows behind him. There are an equal number of seats in each row. What is the total number of seats in the concert hall?