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: [190.479, -22.942, 185.373, 132.005, 186.859, -41.484, 206.636, -59.431, -37.651]

82.205