To find out how many people can fit in an area that is 120 feet wide and 300 feet long, you can divide the total area by the amount of space each person occupies.
The total area of the space is 120 feet * 300 feet = <<120*300=36000>>36000 square feet.
Since each person takes up 2.5 square feet of space, the number of people that can fit in the area is equal to 36000 square feet / 2.5 square feet/person = <<36000/2.5=14400>>14400 people.
So, an area that is 120 feet wide and 300 feet long can accommodate approximately 14400 people.