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: [-74.139, -62.711, 83.1, 211.243, -2.696, 30.722, 79.262, 230.335]

61.89