Definition: 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: [67.226, 174.919, 59.689, 48.932, 175.744, 76.096, -73.8, 227.097, 234.671, -94.816]

89.576