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.

[175.015, 7.294, -30.146, 197.862, 76.557, 16.567, 176.301]
88.493

[23.632, 47.911, 95.884, 239.46, -68.225, 80.094, 111.959]
75.816

[-31.415, -84.329, -82.1]

-65.948