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:
[22.306, 72.768, 218.947, 52.973, 100.121, 157.59, -92.109]

Ex Output:
76.085


Ex Input:
[202.381, 241.483, -33.374, 168.759, -3.111]

Ex Output:

115.228