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:
[219.428, 229.08, 24.616, -83.165, -28.839, 195.219, 170.491, -78.673]

Ex Output:
81.02


Ex Input:
[10.724, -65.993, 107.56, 154.38, 117.135, 114.495, 11.544]

Ex Output:
64.264


Ex Input:
[44.012, -87.249, -23.593, 127.828, 186.361]

Ex Output:

49.472