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.

[54.715, 180.963, 239.308, 175.084, 147.044, 136.262, 184.009]
159.626

[-44.471, 208.445, 208.318, -34.134]
84.54

[127.43, 26.368, -3.244, -44.32, -16.2, -89.489, 136.82]

19.624