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: [124.394, 176.934, 160.269, 180.034, -58.064, 244.896, -81.081, -99.892]

80.936