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: [-6.424, -83.267, -90.261, -62.612, 204.9, 236.683, 49.591, 117.757]

45.796