Detailed Instructions: 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.
Q: [57.463, 117.862, 228.694, 221.841, 68.35, 178.129, 13.932, 240.72, 139.1]
A:
140.677