Let's roll up our sleeves and solve this. We have 439 and we're going to multiply it by 18, essentially adding 439 to itself 18 times.
Step 1: 0 + 439 = 439
Step 2: 439 + 439 = 878
Step 3: 878 + 439 = 1317
Step 4: 1317 + 439 = 1756
Step 5: 1756 + 439 = 2195
Step 6: 2195 + 439 = 2634
Step 7: 2634 + 439 = 3073
Step 8: 3073 + 439 = 3512
Step 9: 3512 + 439 = 3951
Step 10: 3951 + 439 = 4390
Step 11: 4390 + 439 = 4829
Step 12: 4829 + 439 = 5268
Step 13: 5268 + 439 = 5707
Step 14: 5707 + 439 = 6146
Step 15: 6146 + 439 = 6585
Step 16: 6585 + 439 = 7024
Step 17: 7024 + 439 = 7463
Step 18: 7463 + 439 = 7902

So, 439*18 = 7902