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: [-24.354, -96.876, 6.856, 97.97, 127.021, 52.377, 245.34]

58.333