Given the task definition, example input & output, solve the new input case.
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.
Example: [1,3,5]
Output: 3.000
The mean of the input list is (1+3+5)/3, which equals 3. This is a good example.

New input case for you: [78.557, 97.293]
Output:
87.925