Step 1: Divide the number into separate digits:
8692 => 8 6 9 2
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
8 to 6 = 2
6 to 9 = 3
9 to 2 = 7
2 to 8 = 6
Step 3: Combine the filters to a string:
2 3 7 6 = 2376