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:
[120.236, 116.311, -13.268]

Ex Output:
74.426


Ex Input:
[157.92, 102.506, 34.274, 212.874]

Ex Output:

126.893