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:
[134.631, 27.106]

Ex Output:
80.868


Ex Input:
[-74.139, -62.711, 83.1, 211.243, -2.696, 30.722, 79.262, 230.335]

Ex Output:
61.89


Ex Input:
[162.908, -23.953, 124.76, 64.152]

Ex Output:

81.967


