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: [34.054, 236.194, 98.027, 114.677, -31.452, -11.691, 9.946, 233.828, 226.085, 220.98]

113.065