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:
[96.706, 239.918, 73.299, 68.184, 233.512, -76.407]

Ex Output:
105.869


Ex Input:
[-1.31, 169.522, -26.172, 111.289]

Ex Output:
63.332


Ex Input:
[226.287, 114.252, -53.47, 8.606, 234.708, -31.872, 163.615]

Ex Output:

94.589