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: [228.923, 228.115, 155.944, -47.3, 41.384, 27.785, 115.167, 41.426]

98.93