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: [196.561, 5.364, 36.79, 40.919, 135.643, 219.097, -33.065, 211.959, 25.628]

93.211