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:
[185.805, 8.01, 151.056, 35.572, 51.884, 217.1, -0.547, 8.171]

Ex Output:
82.131


Ex Input:
[224.567, -42.213, 232.017]

Ex Output:
138.124


Ex Input:
[196.355, -41.441]

Ex Output:

77.457