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: [78.182, 42.666, -76.123, -79.665, -76.476, 201.452, 76.318, 226.382, 49.449]

49.132