Step 1: Divide the number into separate digits:
02078 => 0 2 0 7 8
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
0 to 2 = 2
2 to 0 = 2
0 to 7 = 7
7 to 8 = 1
8 to 0 = 8
Step 3: Combine the filters to a string:
2 2 7 1 8 = 22718