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:
[88.77, 109.102, -86.446, 207.301, 160.91, -12.956]

Ex Output:
77.78


Ex Input:
[-52.364, 213.017, 247.348, 118.193, 220.782, 91.501]

Ex Output:

139.746