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.
[130.739, 36.207, 93.723, -45.692, -50.344, 174.545, 237.981, -53.065]