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: [120.868, 165.69, 184.06, 134.776, -65.284, 128.806, 145.072, 194.36]

126.044