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.

[120.682, 53.847]
87.264

[226.287, 114.252, -53.47, 8.606, 234.708, -31.872, 163.615]
94.589

[-73.074, 87.743, 221.875, 126.604, 31.513, 196.863]

98.587