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: [31.549, 126.442, 190.664, 147.886, 110.752, 137.165, 6.738, -80.526, -86.857, 37.345]

62.116