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: [-35.413, 12.056, 191.893, 88.703, 72.429, 197.504, -32.411, -53.21]

55.194