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:
[183.332, -51.581, -15.684, 140.965, 37.376, 37.734, 71.356]

Ex Output:
57.643


Ex Input:
[22.306, 72.768, 218.947, 52.973, 100.121, 157.59, -92.109]

Ex Output:
76.085


Ex Input:
[-84.53, 28.414, 120.631, 120.232]

Ex Output:

46.187