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:
[245.091, 201.984, 204.428, 222.046, 4.807, 21.497, -34.025, 160.097]

Ex Output:
128.241


Ex Input:
[45.112, 147.024, -15.583, 33.655, -60.031]

Ex Output:
30.035


Ex Input:
[91.733, 140.433, -46.353, 245.838, -16.87]

Ex Output:

82.956