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.

[14.166, 216.734, -23.073, 209.811, 203.336, 91.659, 142.602, 1.151, -39.869, -54.838]
76.168

[10.724, -65.993, 107.56, 154.38, 117.135, 114.495, 11.544]
64.264

[-92.336, -33.29, 76.403, -31.759]

-20.246