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:
[87.02, -25.654, -67.979, 52.368, 20.078, 160.939, 4.162, 205.092, -57.092, -68.35]

Ex Output:
31.058


Ex Input:
[-17.141, 203.132, -6.872, 155.222, -99.642]

Ex Output:
46.94


Ex Input:
[152.05, 174.962, 23.572, 72.845, -33.477, -76.49, -91.234, 45.782]

Ex Output:

33.501