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.

[-89.318, 247.959, 25.441, -92.763, 172.246, -57.286, 181.58]
55.408

[205.118, 101.679, 202.802, 144.052, -2.468, 239.04, -94.46, 214.193, 193.626]
133.731

[7.476, 41.098, 201.994, -14.448, 157.389, 242.649, -12.911, -87.946, -97.868, 188.986]

62.642