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: [181.293, -4.205, -58.6, 218.035, 90.889, 179.566, -18.358, 10.877, 113.731]

79.248