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:
[192.335, 189.22, 235.216, 130.727, 222.285]

Ex Output:
193.957


Ex Input:
[-94.286, 148.737, 234.8, 148.972]

Ex Output:
109.556


Ex Input:
[218.015, -78.867]

Ex Output:

69.574