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:
[181.256, -78.191, 162.427, -90.527, 123.709, 248.073]

Ex Output:
91.124


Ex Input:
[-98.809, 139.617, 148.76, -52.034, 161.969, 117.253, 16.668, 164.37, -75.91, -31.599]

Ex Output:
49.028


Ex Input:
[237.082, -90.355, 19.413, -20.22, -10.93]

Ex Output:

26.998