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:
[199.153, 182.13, -7.832, -60.259]

Ex Output:
78.298


Ex Input:
[151.151, 144.049, 217.252]

Ex Output:
170.817


Ex Input:
[-74.006, 221.05, 183.353, 203.998, -55.991, 119.453, 155.004, 151.412]

Ex Output:

113.034