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:
[-62.202, 222.562, -18.684, 67.674, -41.353, 134.927, -92.211]

Ex Output:
30.102


Ex Input:
[77.498, 234.955, 184.005, -48.344, 113.167]

Ex Output:
112.256


Ex Input:
[-74.476, -25.467, 103.474, 168.431]

Ex Output:

42.991