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:
[-98.809, 139.617, 148.76, -52.034, 161.969, 117.253, 16.668, 164.37, -75.91, -31.599]

Ex Output:
49.028


Ex Input:
[73.603, -84.154, 222.739, 205.594, 215.842]

Ex Output:
126.725


Ex Input:
[183.144, 190.202, 160.759, 182.261, -81.003, 70.87, 202.743, -38.586, 65.87, 105.757]

Ex Output:

104.202