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:
[176.017, -45.57]

Ex Output:
65.224


Ex Input:
[64.523, 131.207, -30.223, -95.659]

Ex Output:
17.462


Ex Input:
[110.265, 123.686, 150.704, 221.562, 229.167, 2.272, 244.105, 217.565, 75.979]

Ex Output:

152.812