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: [162.645, 32.079, 127.117, 36.041, 19.521, 221.266, -68.557, 199.936, -14.933, -72.207]

64.291