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: [61.199, 17.031, 113.586, 133.07, -94.395, -31.92, 212.336, 168.803, 108.464, -10.231]

67.794