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:
[-90.211, -60.08, 99.87, 18.704, 197.269, 173.722, 168.875]

Ex Output:
72.593


Ex Input:
[72.326, -74.6, 127.566, -54.848, 198.529, -44.061, -28.155]

Ex Output:
28.108


Ex Input:
[-66.461, -23.723, -86.436, -25.52, 17.227, -16.517, 120.023, 197.06, 111.925]

Ex Output:

25.286