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:
[-92.167, -67.984, -31.831, -21.057, 101.792, 114.116, 185.901, -25.874]

Ex Output:
20.362


Ex Input:
[112.53, -67.079, 177.313, 230.482, 57.316, -37.564]

Ex Output:

78.833