Elsa is going for a walk. She walks at a speed of 2 miles per hour for 3.2 miles. For how many hours does she walk?

To find the time Elsa walked, divide the distance she walks, in miles, by her speed, in miles per hour. The distance Elsa walks is 3.2 miles and her speed is 2 miles per hour so she walks for 3.2 / 2 = <<3.2/2=1.6>>1.6 hours. Answer: \boxed{1.6}.