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:
[49.035, -81.115, 27.419]

Ex Output:
-1.554


Ex Input:
[192.74, 78.623, -5.937, 144.535]

Ex Output:
102.49


Ex Input:
[235.686, 14.052, -62.648, 36.22, 243.499, -19.682, 169.25, 141.358, 29.299]

Ex Output:

87.448