Step 1: Divide the number into separate digits:
6932 => 6 9 3 2
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
6 to 9 = 3
9 to 3 = 6
3 to 2 = 1
2 to 6 = 4
Step 3: Combine the filters to a string:
3 6 1 4 = 3614