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: [80.347, 61.158, 71.219, 219.439, 152.642, 153.907, 215.096, 179.864, 241.643, 138.374]

151.369