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:
[88.77, 109.102, -86.446, 207.301, 160.91, -12.956]

Ex Output:
77.78

Ex Input:
[-92.0, 108.814, 164.207, 94.26, 33.74]

Ex Output:
61.804

Ex Input:
[-71.767, 93.635, 106.931, -66.434, -52.767, 211.46, 114.457, -90.156, 3.098, 94.998]

Ex Output:
34.346