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.
[215.084, 106.628, -71.433, -27.602, 213.328, 109.156, -37.15, 176.046, 182.021]