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.

[245.2, 202.565]
223.882

[88.77, 109.102, -86.446, 207.301, 160.91, -12.956]
77.78

[111.053, 93.031, 190.083, 141.554, 109.033, 49.824]

115.763