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:
[-27.722, -35.758, 83.995, -7.374, 60.825, 165.182]

Ex Output:
39.858


Ex Input:
[24.119, 239.006, 239.873, 236.27, 134.34]

Ex Output:
174.722


Ex Input:
[37.626, -60.565, -32.517, -72.804, 148.789, 184.111, -77.953, 39.64, 188.519]

Ex Output:

39.427