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: [85.062, 151.649, 55.188, -74.823, 10.202, -88.815, -75.278, 59.762, 211.788]

37.193