Let's get this math done. We have 389 and we're going to multiply it by 15. This is the same as taking 389 and adding it to itself 15 times.
Step 1: 0 + 389 = 389
Step 2: 389 + 389 = 778
Step 3: 778 + 389 = 1167
Step 4: 1167 + 389 = 1556
Step 5: 1556 + 389 = 1945
Step 6: 1945 + 389 = 2334
Step 7: 2334 + 389 = 2723
Step 8: 2723 + 389 = 3112
Step 9: 3112 + 389 = 3501
Step 10: 3501 + 389 = 3890
Step 11: 3890 + 389 = 4279
Step 12: 4279 + 389 = 4668
Step 13: 4668 + 389 = 5057
Step 14: 5057 + 389 = 5446
Step 15: 5446 + 389 = 5835

So, 389*15 = 5835