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:
[78.523, 239.098, 9.698, 69.94]

Ex Output:
99.315


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

Ex Output:
62.49


Ex Input:
[88.724, 110.019, 248.008, 183.134, 75.695]

Ex Output:

141.116