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: [58.158, 80.899, 176.016, 231.597, -38.907, -25.986, 183.774, 43.886]

88.68