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: [188.616, 79.003, -65.615, -76.318, 83.026, -69.252, 214.45, 35.643, -63.812, -85.226]

24.051