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: [105.122, 242.267, 3.267, 167.525, 22.097, 80.915, 202.126, -36.423, 85.648, 204.794]

107.734