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: [101.123, 196.452, -73.096, 45.159, 129.345, -60.469, -95.697]

34.688