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: [214.695, -42.862, -1.946, 225.511, 26.729, 114.2, 162.062, 64.518, 82.952]

93.984