Step 1: Divide the number into separate digits:
96779 => 9 6 7 7 9
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
9 to 6 = 3
6 to 7 = 1
7 to 7 = 0
7 to 9 = 2
9 to 9 = 0
Step 3: Combine the filters to a string:
3 1 0 2 0 = 31020