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:
[87.02, -25.654, -67.979, 52.368, 20.078, 160.939, 4.162, 205.092, -57.092, -68.35]

Ex Output:
31.058


Ex Input:
[208.678, 219.921, 113.318, 23.83, -42.88, -32.702, -36.191, 117.84, 91.988]

Ex Output:
73.756


Ex Input:
[207.041, -65.569, 55.112, 47.798, 25.728, 60.579, 12.774, -88.361, 103.728]

Ex Output:

39.87