Sure thing! We've got 669 and we're gonna multiply it by 207. That's the same as adding 669 to itself 207 times.
Step 1: 0 + 669 = 669
Step 2: 669 + 669 = 1338
Step 3: 1338 + 669 = 2007
Step 4: 2007 + 669 = 2676
Step 5: 2676 + 669 = 3345
Step 6: 3345 + 669 = 4014
Step 7: 4014 + 669 = 4683
Step 8: 4683 + 669 = 5352
Step 9: 5352 + 669 = 6021
Step 10: 6021 + 669 = 6690
Step 11: 6690 + 669 = 7359
Step 12: 7359 + 669 = 8028
Step 13: 8028 + 669 = 8697
Step 14: 8697 + 669 = 9366
Step 15: 9366 + 669 = 10035
Step 16: 10035 + 669 = 10704
Step 17: 10704 + 669 = 11373
Step 18: 11373 + 669 = 12042
Step 19: 12042 + 669 = 12711
Step 20: 12711 + 669 = 13380
Step 21: 13380 + 669 = 14049
Step 22: 14049 + 669 = 14718
Step 23: 14718 + 669 = 15387
Step 24: 15387 + 669 = 16056
Step 25: 16056 + 669 = 16725
Step 26: 16725 + 669 = 17394
Step 27: 17394 + 669 = 18063
Step 28: 18063 + 669 = 18732
Step 29: 18732 + 669 = 19401
Step 30: 19401 + 669 = 20070
Step 31: 20070 + 669 = 20739
Step 32: 20739 + 669 = 21408
Step 33: 21408 + 669 = 22077
Step 34: 22077 + 669 = 22746
Step 35: 22746 + 669 = 23415
Step 36: 23415 + 669 = 24084
Step 37: 24084 + 669 = 24753
Step 38: 24753 + 669 = 25422
Step 39: 25422 + 669 = 26091
Step 40: 26091 + 669 = 26760
Step 41: 26760 + 669 = 27429
Step 42: 27429 + 669 = 28098
Step 43: 28098 + 669 = 28767
Step 44: 28767 + 669 = 29436
Step 45: 29436 + 669 = 30105
Step 46: 30105 + 669 = 30774
Step 47: 30774 + 669 = 31443
Step 48: 31443 + 669 = 32112
Step 49: 32112 + 669 = 32781
Step 50: 32781 + 669 = 33450
Step 51: 33450 + 669 = 34119
Step 52: 34119 + 669 = 34788
Step 53: 34788 + 669 = 35457
Step 54: 35457 + 669 = 36126
Step 55: 36126 + 669 = 36795
Step 56: 36795 + 669 = 37464
Step 57: 37464 + 669 = 38133
Step 58: 38133 + 669 = 38802
Step 59: 38802 + 669 = 39471
Step 60: 39471 + 669 = 40140
Step 61: 40140 + 669 = 40809
Step 62: 40809 + 669 = 41478
Step 63: 41478 + 669 = 42147
Step 64: 42147 + 669 = 42816
Step 65: 42816 + 669 = 43485
Step 66: 43485 + 669 = 44154
Step 67: 44154 + 669 = 44823
Step 68: 44823 + 669 = 45492
Step 69: 45492 + 669 = 46161
Step 70: 46161 + 669 = 46830
Step 71: 46830 + 669 = 47499
Step 72: 47499 + 669 = 48168
Step 73: 48168 + 669 = 48837
Step 74: 48837 + 669 = 49506
Step 75: 49506 + 669 = 50175
Step 76: 50175 + 669 = 50844
Step 77: 50844 + 669 = 51513
Step 78: 51513 + 669 = 52182
Step 79: 52182 + 669 = 52851
Step 80: 52851 + 669 = 53520
Step 81: 53520 + 669 = 54189
Step 82: 54189 + 669 = 54858
Step 83: 54858 + 669 = 55527
Step 84: 55527 + 669 = 56196
Step 85: 56196 + 669 = 56865
Step 86: 56865 + 669 = 57534
Step 87: 57534 + 669 = 58203
Step 88: 58203 + 669 = 58872
Step 89: 58872 + 669 = 59541
Step 90: 59541 + 669 = 60210
Step 91: 60210 + 669 = 60879
Step 92: 60879 + 669 = 61548
Step 93: 61548 + 669 = 62217
Step 94: 62217 + 669 = 62886
Step 95: 62886 + 669 = 63555
Step 96: 63555 + 669 = 64224
Step 97: 64224 + 669 = 64893
Step 98: 64893 + 669 = 65562
Step 99: 65562 + 669 = 66231
Step 100: 66231 + 669 = 66900
Step 101: 66900 + 669 = 67569
Step 102: 67569 + 669 = 68238
Step 103: 68238 + 669 = 68907
Step 104: 68907 + 669 = 69576
Step 105: 69576 + 669 = 70245
Step 106: 70245 + 669 = 70914
Step 107: 70914 + 669 = 71583
Step 108: 71583 + 669 = 72252
Step 109: 72252 + 669 = 72921
Step 110: 72921 + 669 = 73590
Step 111: 73590 + 669 = 74259
Step 112: 74259 + 669 = 74928
Step 113: 74928 + 669 = 75597
Step 114: 75597 + 669 = 76266
Step 115: 76266 + 669 = 76935
Step 116: 76935 + 669 = 77604
Step 117: 77604 + 669 = 78273
Step 118: 78273 + 669 = 78942
Step 119: 78942 + 669 = 79611
Step 120: 79611 + 669 = 80280
Step 121: 80280 + 669 = 80949
Step 122: 80949 + 669 = 81618
Step 123: 81618 + 669 = 82287
Step 124: 82287 + 669 = 82956
Step 125: 82956 + 669 = 83625
Step 126: 83625 + 669 = 84294
Step 127: 84294 + 669 = 84963
Step 128: 84963 + 669 = 85632
Step 129: 85632 + 669 = 86301
Step 130: 86301 + 669 = 86970
Step 131: 86970 + 669 = 87639
Step 132: 87639 + 669 = 88308
Step 133: 88308 + 669 = 88977
Step 134: 88977 + 669 = 89646
Step 135: 89646 + 669 = 90315
Step 136: 90315 + 669 = 90984
Step 137: 90984 + 669 = 91653
Step 138: 91653 + 669 = 92322
Step 139: 92322 + 669 = 92991
Step 140: 92991 + 669 = 93660
Step 141: 93660 + 669 = 94329
Step 142: 94329 + 669 = 94998
Step 143: 94998 + 669 = 95667
Step 144: 95667 + 669 = 96336
Step 145: 96336 + 669 = 97005
Step 146: 97005 + 669 = 97674
Step 147: 97674 + 669 = 98343
Step 148: 98343 + 669 = 99012
Step 149: 99012 + 669 = 99681
Step 150: 99681 + 669 = 100350
Step 151: 100350 + 669 = 101019
Step 152: 101019 + 669 = 101688
Step 153: 101688 + 669 = 102357
Step 154: 102357 + 669 = 103026
Step 155: 103026 + 669 = 103695
Step 156: 103695 + 669 = 104364
Step 157: 104364 + 669 = 105033
Step 158: 105033 + 669 = 105702
Step 159: 105702 + 669 = 106371
Step 160: 106371 + 669 = 107040
Step 161: 107040 + 669 = 107709
Step 162: 107709 + 669 = 108378
Step 163: 108378 + 669 = 109047
Step 164: 109047 + 669 = 109716
Step 165: 109716 + 669 = 110385
Step 166: 110385 + 669 = 111054
Step 167: 111054 + 669 = 111723
Step 168: 111723 + 669 = 112392
Step 169: 112392 + 669 = 113061
Step 170: 113061 + 669 = 113730
Step 171: 113730 + 669 = 114399
Step 172: 114399 + 669 = 115068
Step 173: 115068 + 669 = 115737
Step 174: 115737 + 669 = 116406
Step 175: 116406 + 669 = 117075
Step 176: 117075 + 669 = 117744
Step 177: 117744 + 669 = 118413
Step 178: 118413 + 669 = 119082
Step 179: 119082 + 669 = 119751
Step 180: 119751 + 669 = 120420
Step 181: 120420 + 669 = 121089
Step 182: 121089 + 669 = 121758
Step 183: 121758 + 669 = 122427
Step 184: 122427 + 669 = 123096
Step 185: 123096 + 669 = 123765
Step 186: 123765 + 669 = 124434
Step 187: 124434 + 669 = 125103
Step 188: 125103 + 669 = 125772
Step 189: 125772 + 669 = 126441
Step 190: 126441 + 669 = 127110
Step 191: 127110 + 669 = 127779
Step 192: 127779 + 669 = 128448
Step 193: 128448 + 669 = 129117
Step 194: 129117 + 669 = 129786
Step 195: 129786 + 669 = 130455
Step 196: 130455 + 669 = 131124
Step 197: 131124 + 669 = 131793
Step 198: 131793 + 669 = 132462
Step 199: 132462 + 669 = 133131
Step 200: 133131 + 669 = 133800
Step 201: 133800 + 669 = 134469
Step 202: 134469 + 669 = 135138
Step 203: 135138 + 669 = 135807
Step 204: 135807 + 669 = 136476
Step 205: 136476 + 669 = 137145
Step 206: 137145 + 669 = 137814
Step 207: 137814 + 669 = 138483

So, 669*207 = 138483