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:
[184.51, 79.649, 31.606, -65.279, 1.231]

Ex Output:
46.343


Ex Input:
[38.343, 177.478, 120.174, -74.923, 98.159]

Ex Output:
71.846


Ex Input:
[-48.087, 56.82, -0.249]

Ex Output:

2.828