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: [-94.649, -47.045, 244.483, 5.338, 243.43, -3.442, 16.366]

52.069