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: [117.697, 175.951, 200.379, 164.197, 231.534, 233.314, 175.515]

185.512