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: [11.014, 180.327, 132.873, 79.311, -63.044, 6.042, 13.948, 218.273, -28.381]

61.151