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:
[109.74, 169.0, 195.864, -1.043, 51.968, -56.564, 214.711, -78.61, 212.459, 228.74]

Ex Output:
104.626


Ex Input:
[245.2, 202.565]

Ex Output:
223.882


Ex Input:
[230.075, 152.69, 98.402, 34.702, 135.723, -4.901, 80.339]

Ex Output:

103.861