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: [124.963, -89.484, 8.032, 146.975, -10.09, 82.917, 182.295]

63.658