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: [45.462, 51.409, 167.318, 5.877, 238.912, 66.292, 231.865, 155.91, 230.673, 244.302]

143.802