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: [34.842, 115.829, 62.148, 202.664, -84.382, 72.455, -0.305, -1.396, 112.898, 191.272]

70.602