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:
[193.711, 110.309, -20.334, 151.607, 158.797, -97.825, -59.931]

Ex Output:
62.333


Ex Input:
[169.737, 56.872, 102.557, -9.77]

Ex Output:
79.849


Ex Input:
[-61.231, 110.674, 83.73, 123.574, 46.056, 166.585]

Ex Output:

78.231