Definition: 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: [53.689, 92.915, 11.009, 30.726, -0.459, -32.267, 104.621]

37.176