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: [225.692, 214.471, 182.679, 79.324, 19.96, 97.946, 116.858, 233.382, 9.615, -59.464]

112.046