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:
[122.737, 189.477, -4.853, 150.031, 126.296, 240.809, 204.743, 29.178]

Ex Output:
132.302


Ex Input:
[-12.392, 57.854, 59.291, -18.155, -94.56, 94.214, -38.912]

Ex Output:
6.763


Ex Input:
[148.662, 196.41, -70.962, 167.723]

Ex Output:

110.458