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:
[142.225, 243.809, -41.935, 96.795, -99.067, 222.292, 113.486, 143.726]

Ex Output:
102.666


Ex Input:
[162.26, 79.268]

Ex Output:
120.764


Ex Input:
[-92.742, 120.077]

Ex Output:

13.667