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: [133.192, 63.648, 230.508, 160.372, 77.396, 104.918, 125.243, 197.82, 52.326, 127.281]

127.27