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: [245.091, 201.984, 204.428, 222.046, 4.807, 21.497, -34.025, 160.097]

128.241