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:
[9.828, 248.054, 20.871, 99.749, 52.797, -86.856, 65.438, 53.627]

Ex Output:
57.939


Ex Input:
[25.58, 99.319, 165.429]

Ex Output:
96.776


Ex Input:
[189.707, 116.173, 33.761, 144.444, 207.418, 75.646, 212.298, -57.764]

Ex Output:

115.21