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: [83.108, 66.439, 237.722, 178.982, 125.938, 40.008, 32.364]

109.223