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:
[65.486, -51.995, 170.628, -23.998, 83.128, -57.38, 130.737, 214.738]

Ex Output:
66.418


Ex Input:
[-20.155, -42.404]

Ex Output:
-31.28


Ex Input:
[58.806, -9.141, -40.07, 197.364, 185.879, 196.209]

Ex Output:

98.175