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.

[80.803, 65.546, 76.403, -70.123, 170.782, 214.183, 140.971, 152.912]
103.935