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: [34.027, -63.649, -28.234, 53.151, -16.65, 212.706, 220.119, 33.88, 136.237, 58.876]

64.046