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:
[211.292, 92.275, 128.423, 242.327, -54.053, 89.501, 64.784]

Ex Output:
110.65


Ex Input:
[-40.246, -7.512, 174.245, -98.6]

Ex Output:
6.972


Ex Input:
[-56.794, 59.597, 56.311, 79.049, 211.553, 106.134, 142.826]

Ex Output:

85.525