OK, let's crack this. We're given 371 and our task is to multiply it by 9. Essentially, we'll be adding 371 to itself 9 times.
Step 1: 0 + 371 = 371
Step 2: 371 + 371 = 742
Step 3: 742 + 371 = 1113
Step 4: 1113 + 371 = 1484
Step 5: 1484 + 371 = 1855
Step 6: 1855 + 371 = 2226
Step 7: 2226 + 371 = 2597
Step 8: 2597 + 371 = 2968
Step 9: 2968 + 371 = 3339

So, 371*9 = 3339