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.

Ex Input:
[206.606, -76.103, -16.863, 44.126, 4.019, 15.088]

Ex Output:
29.479


Ex Input:
[24.119, 239.006, 239.873, 236.27, 134.34]

Ex Output:
174.722


Ex Input:
[-77.355, -39.914, -58.481, 126.87, 215.247, 225.51, 194.059, 15.129, 196.666, 26.548]

Ex Output:

82.428