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.

[126.177, 120.225, 231.498, 170.694, 34.361, 101.823, -21.468, 234.339]
124.706

[199.153, 182.13, -7.832, -60.259]
78.298

[176.555, -42.921, 234.9, -77.061, 195.761, 39.45, 190.59, 176.731, 172.393]

118.489