Definition: 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.
Input: [175.015, 7.294, -30.146, 197.862, 76.557, 16.567, 176.301]

88.493