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: [87.629, -90.426, 248.383, -64.858, 67.942, -93.581, 7.873, 230.21, -76.575, 16.206]

33.28