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:
[207.449, 85.584, -55.048, -10.53, 30.755]

Ex Output:
51.642


Ex Input:
[84.142, -99.804]

Ex Output:
-7.831


Ex Input:
[214.656, -82.183, 105.038, -34.9, -44.836, 143.236, 183.045, 160.483, 34.398]

Ex Output:

75.437