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:
[243.697, 165.796, 114.518, 207.298, 191.227]

Ex Output:
184.507


Ex Input:
[-81.432, -63.059, 150.144, 55.203, 215.405, -89.797, 72.946]

Ex Output:
37.059


Ex Input:
[10.497, -53.988, -76.283, 119.274, 180.003, 128.249, 95.859, 184.641, 80.298]

Ex Output:

74.283