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: [130.781, 61.441, 49.933, 54.647, -3.04, 153.316, 30.724, 73.056, 130.841, 141.979]

82.368