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: [193.704, 112.596, -35.882, 133.038, -31.95, 188.938, -23.184, -87.383]

56.235