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: [242.395, -30.85, 10.764, 112.975, 135.905, 151.714, 22.596, 214.319]

107.477