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:
[37.853, 78.283, 143.128, 82.561, 181.661, -89.154, 50.037]

Ex Output:
69.196


Ex Input:
[217.276, 69.181, 56.534, 10.472, 148.018, 38.673, -94.676, 241.577, -23.436, 45.907]

Ex Output:
70.953


Ex Input:
[206.289, -8.849, 56.154, -53.117, -64.061, -74.533, 131.111, 107.938, 201.014, 75.021]

Ex Output:

57.697