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:
[237.861, 119.858, -8.107, -30.075, 180.524]

Ex Output:
100.012


Ex Input:
[-98.809, 139.617, 148.76, -52.034, 161.969, 117.253, 16.668, 164.37, -75.91, -31.599]

Ex Output:
49.028


Ex Input:
[247.527, 173.51, 25.346, 72.739, 81.215]

Ex Output:

120.067