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: [166.37, 129.717, 181.024, -64.757, 36.721, 48.388, 240.775, 59.551]

99.724