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:
[232.014, -52.265]

Ex Output:
89.875


Ex Input:
[93.433, 148.366, 19.269]

Ex Output:
87.023


Ex Input:
[-89.81, -83.253, 140.015, 105.792, -6.112]

Ex Output:

13.326


