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:
[-89.318, 247.959, 25.441, -92.763, 172.246, -57.286, 181.58]

Ex Output:
55.408


Ex Input:
[2.826, 140.575, -33.207, 75.373]

Ex Output:

46.392