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:
[82.748, 43.804, -13.469, 226.705, -7.478]

Ex Output:
66.462


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

Ex Output:
76.085


Ex Input:
[-93.675, 21.475, -14.654, 150.792, -62.22, 127.352, -50.355, -5.15, 43.103]

Ex Output:

12.963