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.
[230.233, 245.79, 230.167, 170.192, 150.066, 178.333, 13.521, 51.188]