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:
[157.423, -98.775, -67.748, 25.759, 24.697, 150.289, -68.457, 212.57, -9.355]

Ex Output:
36.267


Ex Input:
[82.439, -85.167, 100.665, -83.297]

Ex Output:
3.66


Ex Input:
[32.131, 116.887, 66.741, 218.719, 106.049, -93.999]

Ex Output:

74.421