OK, let's crack this. We're given 667 and our task is to multiply it by 109. Essentially, we'll be adding 667 to itself 109 times.
Step 1: 0 + 667 = 667
Step 2: 667 + 667 = 1334
Step 3: 1334 + 667 = 2001
Step 4: 2001 + 667 = 2668
Step 5: 2668 + 667 = 3335
Step 6: 3335 + 667 = 4002
Step 7: 4002 + 667 = 4669
Step 8: 4669 + 667 = 5336
Step 9: 5336 + 667 = 6003
Step 10: 6003 + 667 = 6670
Step 11: 6670 + 667 = 7337
Step 12: 7337 + 667 = 8004
Step 13: 8004 + 667 = 8671
Step 14: 8671 + 667 = 9338
Step 15: 9338 + 667 = 10005
Step 16: 10005 + 667 = 10672
Step 17: 10672 + 667 = 11339
Step 18: 11339 + 667 = 12006
Step 19: 12006 + 667 = 12673
Step 20: 12673 + 667 = 13340
Step 21: 13340 + 667 = 14007
Step 22: 14007 + 667 = 14674
Step 23: 14674 + 667 = 15341
Step 24: 15341 + 667 = 16008
Step 25: 16008 + 667 = 16675
Step 26: 16675 + 667 = 17342
Step 27: 17342 + 667 = 18009
Step 28: 18009 + 667 = 18676
Step 29: 18676 + 667 = 19343
Step 30: 19343 + 667 = 20010
Step 31: 20010 + 667 = 20677
Step 32: 20677 + 667 = 21344
Step 33: 21344 + 667 = 22011
Step 34: 22011 + 667 = 22678
Step 35: 22678 + 667 = 23345
Step 36: 23345 + 667 = 24012
Step 37: 24012 + 667 = 24679
Step 38: 24679 + 667 = 25346
Step 39: 25346 + 667 = 26013
Step 40: 26013 + 667 = 26680
Step 41: 26680 + 667 = 27347
Step 42: 27347 + 667 = 28014
Step 43: 28014 + 667 = 28681
Step 44: 28681 + 667 = 29348
Step 45: 29348 + 667 = 30015
Step 46: 30015 + 667 = 30682
Step 47: 30682 + 667 = 31349
Step 48: 31349 + 667 = 32016
Step 49: 32016 + 667 = 32683
Step 50: 32683 + 667 = 33350
Step 51: 33350 + 667 = 34017
Step 52: 34017 + 667 = 34684
Step 53: 34684 + 667 = 35351
Step 54: 35351 + 667 = 36018
Step 55: 36018 + 667 = 36685
Step 56: 36685 + 667 = 37352
Step 57: 37352 + 667 = 38019
Step 58: 38019 + 667 = 38686
Step 59: 38686 + 667 = 39353
Step 60: 39353 + 667 = 40020
Step 61: 40020 + 667 = 40687
Step 62: 40687 + 667 = 41354
Step 63: 41354 + 667 = 42021
Step 64: 42021 + 667 = 42688
Step 65: 42688 + 667 = 43355
Step 66: 43355 + 667 = 44022
Step 67: 44022 + 667 = 44689
Step 68: 44689 + 667 = 45356
Step 69: 45356 + 667 = 46023
Step 70: 46023 + 667 = 46690
Step 71: 46690 + 667 = 47357
Step 72: 47357 + 667 = 48024
Step 73: 48024 + 667 = 48691
Step 74: 48691 + 667 = 49358
Step 75: 49358 + 667 = 50025
Step 76: 50025 + 667 = 50692
Step 77: 50692 + 667 = 51359
Step 78: 51359 + 667 = 52026
Step 79: 52026 + 667 = 52693
Step 80: 52693 + 667 = 53360
Step 81: 53360 + 667 = 54027
Step 82: 54027 + 667 = 54694
Step 83: 54694 + 667 = 55361
Step 84: 55361 + 667 = 56028
Step 85: 56028 + 667 = 56695
Step 86: 56695 + 667 = 57362
Step 87: 57362 + 667 = 58029
Step 88: 58029 + 667 = 58696
Step 89: 58696 + 667 = 59363
Step 90: 59363 + 667 = 60030
Step 91: 60030 + 667 = 60697
Step 92: 60697 + 667 = 61364
Step 93: 61364 + 667 = 62031
Step 94: 62031 + 667 = 62698
Step 95: 62698 + 667 = 63365
Step 96: 63365 + 667 = 64032
Step 97: 64032 + 667 = 64699
Step 98: 64699 + 667 = 65366
Step 99: 65366 + 667 = 66033
Step 100: 66033 + 667 = 66700
Step 101: 66700 + 667 = 67367
Step 102: 67367 + 667 = 68034
Step 103: 68034 + 667 = 68701
Step 104: 68701 + 667 = 69368
Step 105: 69368 + 667 = 70035
Step 106: 70035 + 667 = 70702
Step 107: 70702 + 667 = 71369
Step 108: 71369 + 667 = 72036
Step 109: 72036 + 667 = 72703

So, 667*109 = 72703