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: [65.387, 158.51, 5.364, 234.933, 178.782, 208.827, 170.068, -48.79, -56.1, 58.206]

97.519