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:
[77.498, 234.955, 184.005, -48.344, 113.167]

Ex Output:
112.256


Ex Input:
[-21.77, 172.703, -31.807, 129.587, 84.624, 14.279]

Ex Output:
57.936


Ex Input:
[2.302, 221.287, 110.424, -30.176, 118.489, 126.194, -89.842, 104.176, 127.858, 197.862]

Ex Output:

88.857