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.
[111.845, -62.659, 185.517, 113.923, 86.504, 63.083, 201.608, -77.541]