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:
[246.744, 206.484, 194.841]

Ex Output:
216.023


Ex Input:
[-15.843, 236.17, -79.922, -29.879]

Ex Output:
27.632


Ex Input:
[44.791, 180.764, 23.599, 188.419, 46.614, 226.828, 120.348]

Ex Output:

118.766