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:
[41.573, 107.077, 26.564, -66.491, -90.163, 199.995, -28.782]

Ex Output:
27.11


Ex Input:
[126.198, -70.303]

Ex Output:
27.947


Ex Input:
[235.623, 139.112, -64.615, 51.394, 139.92, 114.222, -38.141, -42.465]

Ex Output:

66.881