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: [226.383, 37.978, 174.444, 117.212]

Output: 139.004


Input: Consider Input: [223.951, 2.518, 140.336, -38.799, 217.497, 212.153, 21.874]

Output: 111.361


Input: Consider Input: [189.535, 137.888, 71.631, 36.796, 200.799, 114.517]


Output: 125.194


