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.

[80.493, 235.968, -57.18, 38.066, -86.511, 193.785, 156.598, 45.139, 61.791, 141.607]
80.976

[11.642, -39.595, 23.351, 168.447, 244.85, 108.958, 80.422, -14.774, 138.977]
80.253

[54.181, 68.195, 123.555, 158.006, 177.509, 10.3, -89.165, 144.033, 238.952, -66.686]

81.888