A passenger train transports passengers between two stations located in two separate cities. On a particular day, the train carried 120 passengers from one station to the other one way, and on the return trip carried 80 passengers. If the train made four more round trips that day, taking the same number of people as the first trip in each trip, calculate the total number of passengers transported between both stations for the entire day. Let's think step by step and output the final answer within \boxed{}.
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