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: [80.225, 42.775, 245.206, -40.364, 244.919, 190.505, 107.785, -95.102, 93.166, -96.212]

77.29