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:
[-96.502, 12.006]

Ex Output:
-42.248


Ex Input:
[25.58, 99.319, 165.429]

Ex Output:
96.776


Ex Input:
[-62.125, 109.11]

Ex Output:

23.492