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.

Example Input: [-96.229, 200.453]
Example Output: 52.112

Example Input: [94.752, 94.081, 191.426]
Example Output: 126.753

Example Input: [59.941, 108.996, 238.492, 180.719, 149.263, 236.611, 143.064, -95.824]
Example Output:
127.658