The hallway floor in Ryan's school is covered with square tiles that are 1/2 foot by 1/2 foot. Ryan counted and found that the hallway is 15 tiles wide and 60 tiles long.

A. How many tiles cover the hallway floor? (Already solved. 900 tiles)
B. What is the area of the hallway floor? (Show work on a paper and send it to me or explain it.) ☹️