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:
[84.091, 17.564, 58.169, 6.482, 53.256, 216.444, 171.489]

Ex Output:
86.785


Ex Input:
[209.13, -12.632, 247.489, 55.492, 8.967, -90.158, 193.743]

Ex Output:
87.433


Ex Input:
[30.533, 204.382]

Ex Output:

117.458