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: [52.075, -59.106, 40.261, -65.456, 136.403, -96.463, -98.623, 193.043, 93.633]

21.752