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: [67.333, -6.25, 145.652, -89.418, -47.298, -23.871, 182.589]

32.677