I don't get this math problem solving question.. Help!!?

A long distance foot race known as a marathon covers a course of about 26.2 mi. In 1984, the first time women competed in the marathon in the Olympic Games, the race was won by Joan Benoit of the United States. At one point, she was three times as far from the end of the course as she was from the starting point. How many miles had she run at that time.