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:
[120.682, 53.847]

Ex Output:
87.264


Ex Input:
[205.118, 101.679, 202.802, 144.052, -2.468, 239.04, -94.46, 214.193, 193.626]

Ex Output:
133.731


Ex Input:
[-2.024, -54.741, 192.956, 137.669]

Ex Output:

68.465