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: [92.042, 238.351, 45.238, 144.862, 176.455, -99.558, 20.059, -91.56]

65.736