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: [195.64, 22.532, -32.619, 249.056, -93.903, -27.887, 55.242]

52.58