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:
[85.925, 218.341, -55.232, 136.11, 243.387, 98.158, 183.742, 85.875, 124.291, -95.213]

Ex Output:
102.538


Ex Input:
[21.531, 221.161, -31.194]

Ex Output:
70.499


Ex Input:
[114.898, 91.618]

Ex Output:

103.258