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: [208.754, 99.767, 44.663, -90.502, 8.27, 82.216, -22.635, 16.237, 65.406, 205.207]

61.738