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: [52.156, 45.137, 132.517, -93.142, 162.396, 27.849, 37.102, 173.1, -99.134, 63.899]

50.188