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: [85.138, 39.129, 92.876, 225.752, 28.842, 180.221, 222.887, 122.257]

124.638