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: [110.265, 123.686, 150.704, 221.562, 229.167, 2.272, 244.105, 217.565, 75.979]

152.812