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:
[93.405, -31.061]

Ex Output:
31.172


Ex Input:
[157.631, 106.369, -25.319, 160.78, -87.597, 222.819, -60.99, 36.758, -3.695]

Ex Output:
56.306


Ex Input:
[124.394, 176.934, 160.269, 180.034, -58.064, 244.896, -81.081, -99.892]

Ex Output:

80.936