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.

Input: Consider Input: [207.165, 246.399, 44.821, -21.671]

Output: 119.178


Input: Consider Input: [116.074, 213.452, 86.981]

Output: 138.836


Input: Consider Input: [164.406, 184.998, -66.442, 89.34, -1.556, -17.756, 247.809, -48.086, 146.561, 88.855]


Output: 78.813