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:
[157.631, 106.369, -25.319, 160.78, -87.597, 222.819, -60.99, 36.758, -3.695]

Ex Output:
56.306


Ex Input:
[159.243, 17.964, 13.543, 175.402, -52.441, -34.741, 158.461]

Ex Output:
62.49


Ex Input:
[-94.332, 235.196, 71.433, -91.591, 197.609, 16.597, 87.414, 153.654, 227.278, -74.116]

Ex Output:

72.914