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: [115.158, 2.296, 122.393, -22.615, 56.661, 70.718, -79.846, 95.847]

45.076