OK, let's work through this together. We're starting with 722 and we're going to multiply it by 210, which means we add 722 to itself 210 times.
Step 1: 0 + 722 = 722
Step 2: 722 + 722 = 1444
Step 3: 1444 + 722 = 2166
Step 4: 2166 + 722 = 2888
Step 5: 2888 + 722 = 3610
Step 6: 3610 + 722 = 4332
Step 7: 4332 + 722 = 5054
Step 8: 5054 + 722 = 5776
Step 9: 5776 + 722 = 6498
Step 10: 6498 + 722 = 7220
Step 11: 7220 + 722 = 7942
Step 12: 7942 + 722 = 8664
Step 13: 8664 + 722 = 9386
Step 14: 9386 + 722 = 10108
Step 15: 10108 + 722 = 10830
Step 16: 10830 + 722 = 11552
Step 17: 11552 + 722 = 12274
Step 18: 12274 + 722 = 12996
Step 19: 12996 + 722 = 13718
Step 20: 13718 + 722 = 14440
Step 21: 14440 + 722 = 15162
Step 22: 15162 + 722 = 15884
Step 23: 15884 + 722 = 16606
Step 24: 16606 + 722 = 17328
Step 25: 17328 + 722 = 18050
Step 26: 18050 + 722 = 18772
Step 27: 18772 + 722 = 19494
Step 28: 19494 + 722 = 20216
Step 29: 20216 + 722 = 20938
Step 30: 20938 + 722 = 21660
Step 31: 21660 + 722 = 22382
Step 32: 22382 + 722 = 23104
Step 33: 23104 + 722 = 23826
Step 34: 23826 + 722 = 24548
Step 35: 24548 + 722 = 25270
Step 36: 25270 + 722 = 25992
Step 37: 25992 + 722 = 26714
Step 38: 26714 + 722 = 27436
Step 39: 27436 + 722 = 28158
Step 40: 28158 + 722 = 28880
Step 41: 28880 + 722 = 29602
Step 42: 29602 + 722 = 30324
Step 43: 30324 + 722 = 31046
Step 44: 31046 + 722 = 31768
Step 45: 31768 + 722 = 32490
Step 46: 32490 + 722 = 33212
Step 47: 33212 + 722 = 33934
Step 48: 33934 + 722 = 34656
Step 49: 34656 + 722 = 35378
Step 50: 35378 + 722 = 36100
Step 51: 36100 + 722 = 36822
Step 52: 36822 + 722 = 37544
Step 53: 37544 + 722 = 38266
Step 54: 38266 + 722 = 38988
Step 55: 38988 + 722 = 39710
Step 56: 39710 + 722 = 40432
Step 57: 40432 + 722 = 41154
Step 58: 41154 + 722 = 41876
Step 59: 41876 + 722 = 42598
Step 60: 42598 + 722 = 43320
Step 61: 43320 + 722 = 44042
Step 62: 44042 + 722 = 44764
Step 63: 44764 + 722 = 45486
Step 64: 45486 + 722 = 46208
Step 65: 46208 + 722 = 46930
Step 66: 46930 + 722 = 47652
Step 67: 47652 + 722 = 48374
Step 68: 48374 + 722 = 49096
Step 69: 49096 + 722 = 49818
Step 70: 49818 + 722 = 50540
Step 71: 50540 + 722 = 51262
Step 72: 51262 + 722 = 51984
Step 73: 51984 + 722 = 52706
Step 74: 52706 + 722 = 53428
Step 75: 53428 + 722 = 54150
Step 76: 54150 + 722 = 54872
Step 77: 54872 + 722 = 55594
Step 78: 55594 + 722 = 56316
Step 79: 56316 + 722 = 57038
Step 80: 57038 + 722 = 57760
Step 81: 57760 + 722 = 58482
Step 82: 58482 + 722 = 59204
Step 83: 59204 + 722 = 59926
Step 84: 59926 + 722 = 60648
Step 85: 60648 + 722 = 61370
Step 86: 61370 + 722 = 62092
Step 87: 62092 + 722 = 62814
Step 88: 62814 + 722 = 63536
Step 89: 63536 + 722 = 64258
Step 90: 64258 + 722 = 64980
Step 91: 64980 + 722 = 65702
Step 92: 65702 + 722 = 66424
Step 93: 66424 + 722 = 67146
Step 94: 67146 + 722 = 67868
Step 95: 67868 + 722 = 68590
Step 96: 68590 + 722 = 69312
Step 97: 69312 + 722 = 70034
Step 98: 70034 + 722 = 70756
Step 99: 70756 + 722 = 71478
Step 100: 71478 + 722 = 72200
Step 101: 72200 + 722 = 72922
Step 102: 72922 + 722 = 73644
Step 103: 73644 + 722 = 74366
Step 104: 74366 + 722 = 75088
Step 105: 75088 + 722 = 75810
Step 106: 75810 + 722 = 76532
Step 107: 76532 + 722 = 77254
Step 108: 77254 + 722 = 77976
Step 109: 77976 + 722 = 78698
Step 110: 78698 + 722 = 79420
Step 111: 79420 + 722 = 80142
Step 112: 80142 + 722 = 80864
Step 113: 80864 + 722 = 81586
Step 114: 81586 + 722 = 82308
Step 115: 82308 + 722 = 83030
Step 116: 83030 + 722 = 83752
Step 117: 83752 + 722 = 84474
Step 118: 84474 + 722 = 85196
Step 119: 85196 + 722 = 85918
Step 120: 85918 + 722 = 86640
Step 121: 86640 + 722 = 87362
Step 122: 87362 + 722 = 88084
Step 123: 88084 + 722 = 88806
Step 124: 88806 + 722 = 89528
Step 125: 89528 + 722 = 90250
Step 126: 90250 + 722 = 90972
Step 127: 90972 + 722 = 91694
Step 128: 91694 + 722 = 92416
Step 129: 92416 + 722 = 93138
Step 130: 93138 + 722 = 93860
Step 131: 93860 + 722 = 94582
Step 132: 94582 + 722 = 95304
Step 133: 95304 + 722 = 96026
Step 134: 96026 + 722 = 96748
Step 135: 96748 + 722 = 97470
Step 136: 97470 + 722 = 98192
Step 137: 98192 + 722 = 98914
Step 138: 98914 + 722 = 99636
Step 139: 99636 + 722 = 100358
Step 140: 100358 + 722 = 101080
Step 141: 101080 + 722 = 101802
Step 142: 101802 + 722 = 102524
Step 143: 102524 + 722 = 103246
Step 144: 103246 + 722 = 103968
Step 145: 103968 + 722 = 104690
Step 146: 104690 + 722 = 105412
Step 147: 105412 + 722 = 106134
Step 148: 106134 + 722 = 106856
Step 149: 106856 + 722 = 107578
Step 150: 107578 + 722 = 108300
Step 151: 108300 + 722 = 109022
Step 152: 109022 + 722 = 109744
Step 153: 109744 + 722 = 110466
Step 154: 110466 + 722 = 111188
Step 155: 111188 + 722 = 111910
Step 156: 111910 + 722 = 112632
Step 157: 112632 + 722 = 113354
Step 158: 113354 + 722 = 114076
Step 159: 114076 + 722 = 114798
Step 160: 114798 + 722 = 115520
Step 161: 115520 + 722 = 116242
Step 162: 116242 + 722 = 116964
Step 163: 116964 + 722 = 117686
Step 164: 117686 + 722 = 118408
Step 165: 118408 + 722 = 119130
Step 166: 119130 + 722 = 119852
Step 167: 119852 + 722 = 120574
Step 168: 120574 + 722 = 121296
Step 169: 121296 + 722 = 122018
Step 170: 122018 + 722 = 122740
Step 171: 122740 + 722 = 123462
Step 172: 123462 + 722 = 124184
Step 173: 124184 + 722 = 124906
Step 174: 124906 + 722 = 125628
Step 175: 125628 + 722 = 126350
Step 176: 126350 + 722 = 127072
Step 177: 127072 + 722 = 127794
Step 178: 127794 + 722 = 128516
Step 179: 128516 + 722 = 129238
Step 180: 129238 + 722 = 129960
Step 181: 129960 + 722 = 130682
Step 182: 130682 + 722 = 131404
Step 183: 131404 + 722 = 132126
Step 184: 132126 + 722 = 132848
Step 185: 132848 + 722 = 133570
Step 186: 133570 + 722 = 134292
Step 187: 134292 + 722 = 135014
Step 188: 135014 + 722 = 135736
Step 189: 135736 + 722 = 136458
Step 190: 136458 + 722 = 137180
Step 191: 137180 + 722 = 137902
Step 192: 137902 + 722 = 138624
Step 193: 138624 + 722 = 139346
Step 194: 139346 + 722 = 140068
Step 195: 140068 + 722 = 140790
Step 196: 140790 + 722 = 141512
Step 197: 141512 + 722 = 142234
Step 198: 142234 + 722 = 142956
Step 199: 142956 + 722 = 143678
Step 200: 143678 + 722 = 144400
Step 201: 144400 + 722 = 145122
Step 202: 145122 + 722 = 145844
Step 203: 145844 + 722 = 146566
Step 204: 146566 + 722 = 147288
Step 205: 147288 + 722 = 148010
Step 206: 148010 + 722 = 148732
Step 207: 148732 + 722 = 149454
Step 208: 149454 + 722 = 150176
Step 209: 150176 + 722 = 150898
Step 210: 150898 + 722 = 151620

So, 722*210 = 151620