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:
[-24.857, -28.799, 240.99]

Ex Output:
62.445


Ex Input:
[231.159, 217.795, 230.676, -11.951, -82.697, 31.413]

Ex Output:
102.732


Ex Input:
[78.024, 17.922, 232.34, 191.572, -91.098, 5.456, 241.532, 146.535, 183.359, 218.778]

Ex Output:

122.442