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: [-7.898, -72.702, -38.265, -19.34, 121.705, 56.761, 130.055, 38.452]

26.096