OK, let's crack this. We're given 629 and our task is to multiply it by 19. Essentially, we'll be adding 629 to itself 19 times.
Step 1: 0 + 629 = 629
Step 2: 629 + 629 = 1258
Step 3: 1258 + 629 = 1887
Step 4: 1887 + 629 = 2516
Step 5: 2516 + 629 = 3145
Step 6: 3145 + 629 = 3774
Step 7: 3774 + 629 = 4403
Step 8: 4403 + 629 = 5032
Step 9: 5032 + 629 = 5661
Step 10: 5661 + 629 = 6290
Step 11: 6290 + 629 = 6919
Step 12: 6919 + 629 = 7548
Step 13: 7548 + 629 = 8177
Step 14: 8177 + 629 = 8806
Step 15: 8806 + 629 = 9435
Step 16: 9435 + 629 = 10064
Step 17: 10064 + 629 = 10693
Step 18: 10693 + 629 = 11322
Step 19: 11322 + 629 = 11951

So, 629*19 = 11951