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.

Ex Input:
[-86.423, 157.154, 69.563, -67.516, 147.66, 216.018, 213.404]

Ex Output:
92.837


Ex Input:
[236.753, 184.794, -45.415, 20.278, -41.34, 109.146, 176.83]

Ex Output:
91.578


Ex Input:
[3.402, 123.403, 155.401, 193.566, 12.549, 194.144, 77.964, 65.128, 37.553, -73.981]

Ex Output:

78.913