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: [182.852, 102.398, 200.428, -71.943, 50.578, -59.389, 0.465]

57.913