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:
[227.874, 175.626, 193.094, 63.963, 139.938]

Ex Output:
160.099


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:
[72.562, 168.233, 57.896, -15.978, 205.269, 113.703, -35.753, 170.648, 128.816, 128.697]

Ex Output:

99.409