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:
[32.131, 116.887, 66.741, 218.719, 106.049, -93.999]

Ex Output:
74.421


Ex Input:
[-58.447, 213.433, 187.859, 103.704]

Ex Output:
111.637


Ex Input:
[138.63, 106.759, 86.625]

Ex Output:

110.671