In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.

Ex Input:
[-79.521, 169.962, 120.036, -71.612, -53.261, -90.734, -35.559, 140.419, 25.016]

Ex Output:
13.861


Ex Input:
[247.332, 97.053, 43.697, 51.168, -56.25, 163.444]

Ex Output:
91.074


Ex Input:
[61.57, 87.563, 30.863, 34.388, 19.529, 187.264]

Ex Output:

70.196