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: [43.213, 89.267, 70.912, 151.78, 105.192, -23.468, -50.833, 131.406]

64.684