Let's roll up our sleeves and solve this. We have 849 and we're going to multiply it by 17, essentially adding 849 to itself 17 times.
Step 1: 0 + 849 = 849
Step 2: 849 + 849 = 1698
Step 3: 1698 + 849 = 2547
Step 4: 2547 + 849 = 3396
Step 5: 3396 + 849 = 4245
Step 6: 4245 + 849 = 5094
Step 7: 5094 + 849 = 5943
Step 8: 5943 + 849 = 6792
Step 9: 6792 + 849 = 7641
Step 10: 7641 + 849 = 8490
Step 11: 8490 + 849 = 9339
Step 12: 9339 + 849 = 10188
Step 13: 10188 + 849 = 11037
Step 14: 11037 + 849 = 11886
Step 15: 11886 + 849 = 12735
Step 16: 12735 + 849 = 13584
Step 17: 13584 + 849 = 14433

So, 849*17 = 14433