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:
[-75.579, -19.294, 243.752, 167.559, 86.218, 48.102, 28.694, 31.259, 182.995]

Ex Output:
77.078


Ex Input:
[61.739, -99.854, -53.677]

Ex Output:
-30.597


Ex Input:
[233.239, 45.243, -83.329, 221.029, 196.435, 163.964, -17.125, 224.42, 228.382]

Ex Output:

134.695