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: [184.463, 208.552, 167.923, 238.961, -28.824, 177.799, 203.581, 214.867]

170.915