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: [-16.898, 37.874, -62.807, 233.541, 121.576, 65.272, -47.774, -69.595]

32.649