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:
[116.268, 173.27, 228.827, 52.695, 66.445, -34.051, 152.137]

Ex Output:
107.942


Ex Input:
[157.14, 120.799, -55.651, -50.479, 89.067, 192.279, 57.227, 137.972]

Ex Output:
81.044


Ex Input:
[181.576, 65.507, -21.908, 243.853, 157.966, -97.966]

Ex Output:

88.171