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.
[41.621, 71.805, 69.776, 1.679, 216.449, 183.495, -59.441, -6.956]