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: [226.185, 12.821, 114.546, 201.505, 225.492, 99.184, 222.264, 45.814]

143.476