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:
[-12.392, 57.854, 59.291, -18.155, -94.56, 94.214, -38.912]

Ex Output:
6.763


Ex Input:
[110.444, 23.089, -6.235, 112.579, 31.292, 190.857, 58.854, 148.587, 163.706, -5.219]

Ex Output:
82.795


Ex Input:
[-16.311, -32.964, -68.665, 207.661]

Ex Output:

22.43