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: [133.901, 72.753, 175.111, 142.876, -70.179, 133.958, -90.363, -60.25, 201.114, -51.353]

58.757