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:
[75.879, 43.123]

Ex Output:
59.501


Ex Input:
[212.456, 6.972, -59.399, -83.342, 215.038, -97.851]

Ex Output:
32.312


Ex Input:
[84.624, 77.809, 87.962, 181.674, -81.772, 67.113]

Ex Output:

69.568