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:
[-17.026, 165.89]

Ex Output:
74.432


Ex Input:
[218.807, 72.849, 7.838, 124.81, 45.929, 239.888]

Ex Output:
118.354


Ex Input:
[82.482, 243.593, -95.232, 239.457, -73.123, 157.387, 64.543, 46.107, 168.68]

Ex Output:

92.655