Alright, let's solve this math problem step by step. First, we have the number 451. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 19. So, we're going to take the number 451 and add it to itself 19 times.
Step 1: 0 + 451 = 451
Step 2: 451 + 451 = 902
Step 3: 902 + 451 = 1353
Step 4: 1353 + 451 = 1804
Step 5: 1804 + 451 = 2255
Step 6: 2255 + 451 = 2706
Step 7: 2706 + 451 = 3157
Step 8: 3157 + 451 = 3608
Step 9: 3608 + 451 = 4059
Step 10: 4059 + 451 = 4510
Step 11: 4510 + 451 = 4961
Step 12: 4961 + 451 = 5412
Step 13: 5412 + 451 = 5863
Step 14: 5863 + 451 = 6314
Step 15: 6314 + 451 = 6765
Step 16: 6765 + 451 = 7216
Step 17: 7216 + 451 = 7667
Step 18: 7667 + 451 = 8118
Step 19: 8118 + 451 = 8569

So, 451*19 = 8569