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: [64.595, -45.649, -89.932, 64.731, 60.21, 110.264, 140.081, 130.128, -51.886, -50.04]

33.25