Definition: 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.
Input: [-10.77, 151.741, 149.095, -67.249, -50.444, 168.522, 181.723, 163.444]

85.758