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: [-0.47, 201.362, 30.206, 60.602, 24.415, 45.176, -17.683]

49.087