With a short time remaining in the day, a delivery driver has time to make deliveries at 4 locations among the 8 locations remaining. How many different routes are possible? There are possible different routes. (Simplify your answer.) A classic counting problem is to determine the number of different ways that the letters of "parallel" can be arranged. Find that number. The number of different ways that the letters of "parallel" can be arranged is (Simplify your answer.)