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: [58.197, -49.495, -29.337, 64.749, -17.774, 14.023, -28.494, 166.939, 138.524, 43.757]

36.109