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: [244.419, 64.966, -38.225, 28.882, 49.623, 90.963, 49.927]

70.079