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.

Input: Consider Input: [-27.872, -9.249, 218.646, -32.0, 49.715, 58.225, 118.489, 29.679, 31.407]

Output: 48.56

Input: Consider Input: [34.718, 46.286, 107.22, 181.771, -27.702, -66.747]

Output: 45.924

Input: Consider Input: [193.817, 78.977, 76.476, 149.415, -83.27, -36.422, 47.619, 146.155, -45.545, 198.086]
Output: 72.531