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:
[126.177, 120.225, 231.498, 170.694, 34.361, 101.823, -21.468, 234.339]

Ex Output:
124.706


Ex Input:
[82.748, 43.804, -13.469, 226.705, -7.478]

Ex Output:
66.462


Ex Input:
[172.686, 46.972, 139.657, -30.122, 126.099, 89.965, 145.669]

Ex Output:

98.704