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: [164.73, -95.591, 134.663, 204.935, 38.575, -44.862, 110.546, 184.195, -28.878, -27.693]

64.062