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:
[70.282, -54.718, 95.793, 94.043, 183.314]

Ex Output:
77.743


Ex Input:
[112.026, 20.03, 73.595, -24.957, 185.718, 36.43, 206.024]

Ex Output:
86.981


Ex Input:
[-98.388, 210.844, 170.205, 128.375, 238.855, -71.188, -23.816]

Ex Output:

79.27


