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:
[140.332, 92.06]

Ex Output:
116.196


Ex Input:
[102.524, 88.129, 196.972]

Ex Output:
129.208


Ex Input:
[164.878, 154.131, 147.391, 81.562, -39.718]

Ex Output:

101.649