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: [0.323, 11.306, 87.604, -83.158, 11.366, 49.123, 23.318, 53.095]

19.122