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: [-76.355, 182.337, -7.566, 130.962, 170.278, 132.067, 194.871, 59.557, -59.749, -8.469]

71.793