Sure thing! We've got 833 and we're gonna multiply it by 15. That's the same as adding 833 to itself 15 times.
Step 1: 0 + 833 = 833
Step 2: 833 + 833 = 1666
Step 3: 1666 + 833 = 2499
Step 4: 2499 + 833 = 3332
Step 5: 3332 + 833 = 4165
Step 6: 4165 + 833 = 4998
Step 7: 4998 + 833 = 5831
Step 8: 5831 + 833 = 6664
Step 9: 6664 + 833 = 7497
Step 10: 7497 + 833 = 8330
Step 11: 8330 + 833 = 9163
Step 12: 9163 + 833 = 9996
Step 13: 9996 + 833 = 10829
Step 14: 10829 + 833 = 11662
Step 15: 11662 + 833 = 12495

So, 833*15 = 12495