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: [1.124, 115.614, 193.522, 5.316, 225.689, 12.964, 81.637, 77.57, 149.36]

95.866