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: [118.525, 186.88, 22.958, 66.43, 186.813, -48.67, 9.883, -30.751, 1.457, 4.094]

51.762