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: [-47.505, -62.534, 205.622, -65.294, 84.133, -90.197, -51.526, 134.582, -63.206, -53.026]

-0.895