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: [178.719, 196.289, 125.624, 161.807, -1.578, -42.576, 211.912, 105.41]

116.951