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:
[64.523, 131.207, -30.223, -95.659]

Ex Output:
17.462


Ex Input:
[-13.364, -79.694, -23.447, -46.589, 144.97, -28.554, 212.875, 208.512, 171.399]

Ex Output:

60.679