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:
[-7.775, 55.997, 216.046]

Ex Output:
88.089


Ex Input:
[10.724, -65.993, 107.56, 154.38, 117.135, 114.495, 11.544]

Ex Output:
64.264


Ex Input:
[-32.67, -24.717, 138.84, 206.052, -85.698, 176.068]

Ex Output:

62.979