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: [116.498, 208.607, 15.647, 193.92, -41.359, 168.883, -58.07, -70.958, 85.363]

68.726