OK, let's work through this together. We're starting with 655 and we're going to multiply it by 13, which means we add 655 to itself 13 times.
Step 1: 0 + 655 = 655
Step 2: 655 + 655 = 1310
Step 3: 1310 + 655 = 1965
Step 4: 1965 + 655 = 2620
Step 5: 2620 + 655 = 3275
Step 6: 3275 + 655 = 3930
Step 7: 3930 + 655 = 4585
Step 8: 4585 + 655 = 5240
Step 9: 5240 + 655 = 5895
Step 10: 5895 + 655 = 6550
Step 11: 6550 + 655 = 7205
Step 12: 7205 + 655 = 7860
Step 13: 7860 + 655 = 8515

So, 655*13 = 8515