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:
[-66.387, 135.639, 182.921, 175.573, 105.67, -29.751, 156.67, 83.119, 19.538]

Ex Output:
84.777


Ex Input:
[-41.362, 123.84, 236.661, -43.042, 53.399, 15.001, 10.159, 38.886, 74.298, 167.559]

Ex Output:
63.54


Ex Input:
[-12.392, 57.854, 59.291, -18.155, -94.56, 94.214, -38.912]

Ex Output:

6.763