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: [164.048, 94.225, 164.003, -19.198, 47.156, 4.59, 170.668, 156.371, -13.172, -27.61]

74.108