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:
[-49.786, 238.124, -20.697, 32.014]

Ex Output:
49.914


Ex Input:
[219.769, -36.26, 3.121, -22.5, 124.372]

Ex Output:
57.7


Ex Input:
[236.753, 184.794, -45.415, 20.278, -41.34, 109.146, 176.83]

Ex Output:

91.578