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: [205.849, 33.047, 44.849, 123.064, 166.617, -40.315, 209.324, 166.773, 233.158, 185.368]

132.773