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: [125.624, -3.666, 246.491, -65.002, -44.792, 89.409, 17.159, 29.644, 76.824, 7.394]

47.908