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: [220.903, 155.959]

Output: 188.431


Input: Consider Input: [-62.202, 222.562, -18.684, 67.674, -41.353, 134.927, -92.211]

Output: 30.102


Input: Consider Input: [242.8, -51.096, -51.035, 216.928]


Output: 89.399