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: [65.268, -49.952, -59.449, 161.602, 223.231, -87.708, 43.299, 237.731]

66.753