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: [179.4, 215.455, 209.283, 161.761, -75.018, -81.007, 203.625, 42.0]

106.937