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.
[107.185, 44.602, 211.189, 152.337, 47.089, -0.203, 3.234, -93.925, 93.86]