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:
[141.597, -13.558, -15.987, -52.44, 77.914]

Ex Output:
27.505


Ex Input:
[182.441, 58.468, 209.229, 249.908, 32.346, 30.442]

Ex Output:
127.139


Ex Input:
[72.594, 168.59, -54.46, 46.88, 125.084]

Ex Output:

71.738