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:
[-50.208, 248.001, -92.993, -67.867, -25.771, 57.557]

Ex Output:
11.453


Ex Input:
[14.166, 216.734, -23.073, 209.811, 203.336, 91.659, 142.602, 1.151, -39.869, -54.838]

Ex Output:
76.168


Ex Input:
[72.882, 36.476, 231.44]

Ex Output:

113.599


