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.
[-47.326, 201.111, 66.063, 204.227, -9.305, 124.244, 96.493]