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: [233.662, 111.478, 105.764, 0.434, 13.298, -94.959, -15.334, 57.322]

51.458