Step 1: Divide the number into separate digits:
30295 => 3 0 2 9 5
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
3 to 0 = 3
0 to 2 = 2
2 to 9 = 7
9 to 5 = 4
5 to 3 = 2
Step 3: Combine the filters to a string:
3 2 7 4 2 = 32742