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: [67.583, -10.297, 201.716, 213.773, -58.542, 130.437, 225.492, 55.267]

103.179