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:
[80.285, 75.631, 5.715, -68.695, 134.225, 22.744, 63.203, 136.862, 60.995]

Ex Output:
56.774


Ex Input:
[161.683, 162.041, 187.429, -79.681, 60.809, 225.806]

Ex Output:
119.681


Ex Input:
[80.225, 42.775, 245.206, -40.364, 244.919, 190.505, 107.785, -95.102, 93.166, -96.212]

Ex Output:

77.29