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: [224.092, 9.089, 225.266, 188.507, -24.805, -21.37, 150.695, 202.716, -56.482, -69.423]

82.828