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: [192.998, -56.541, 240.398, 134.28, -45.321, -31.411, -55.46, 38.051]

52.124