Let's roll up our sleeves and solve this. We have 428 and we're going to multiply it by 351, essentially adding 428 to itself 351 times.
Step 1: 0 + 428 = 428
Step 2: 428 + 428 = 856
Step 3: 856 + 428 = 1284
Step 4: 1284 + 428 = 1712
Step 5: 1712 + 428 = 2140
Step 6: 2140 + 428 = 2568
Step 7: 2568 + 428 = 2996
Step 8: 2996 + 428 = 3424
Step 9: 3424 + 428 = 3852
Step 10: 3852 + 428 = 4280
Step 11: 4280 + 428 = 4708
Step 12: 4708 + 428 = 5136
Step 13: 5136 + 428 = 5564
Step 14: 5564 + 428 = 5992
Step 15: 5992 + 428 = 6420
Step 16: 6420 + 428 = 6848
Step 17: 6848 + 428 = 7276
Step 18: 7276 + 428 = 7704
Step 19: 7704 + 428 = 8132
Step 20: 8132 + 428 = 8560
Step 21: 8560 + 428 = 8988
Step 22: 8988 + 428 = 9416
Step 23: 9416 + 428 = 9844
Step 24: 9844 + 428 = 10272
Step 25: 10272 + 428 = 10700
Step 26: 10700 + 428 = 11128
Step 27: 11128 + 428 = 11556
Step 28: 11556 + 428 = 11984
Step 29: 11984 + 428 = 12412
Step 30: 12412 + 428 = 12840
Step 31: 12840 + 428 = 13268
Step 32: 13268 + 428 = 13696
Step 33: 13696 + 428 = 14124
Step 34: 14124 + 428 = 14552
Step 35: 14552 + 428 = 14980
Step 36: 14980 + 428 = 15408
Step 37: 15408 + 428 = 15836
Step 38: 15836 + 428 = 16264
Step 39: 16264 + 428 = 16692
Step 40: 16692 + 428 = 17120
Step 41: 17120 + 428 = 17548
Step 42: 17548 + 428 = 17976
Step 43: 17976 + 428 = 18404
Step 44: 18404 + 428 = 18832
Step 45: 18832 + 428 = 19260
Step 46: 19260 + 428 = 19688
Step 47: 19688 + 428 = 20116
Step 48: 20116 + 428 = 20544
Step 49: 20544 + 428 = 20972
Step 50: 20972 + 428 = 21400
Step 51: 21400 + 428 = 21828
Step 52: 21828 + 428 = 22256
Step 53: 22256 + 428 = 22684
Step 54: 22684 + 428 = 23112
Step 55: 23112 + 428 = 23540
Step 56: 23540 + 428 = 23968
Step 57: 23968 + 428 = 24396
Step 58: 24396 + 428 = 24824
Step 59: 24824 + 428 = 25252
Step 60: 25252 + 428 = 25680
Step 61: 25680 + 428 = 26108
Step 62: 26108 + 428 = 26536
Step 63: 26536 + 428 = 26964
Step 64: 26964 + 428 = 27392
Step 65: 27392 + 428 = 27820
Step 66: 27820 + 428 = 28248
Step 67: 28248 + 428 = 28676
Step 68: 28676 + 428 = 29104
Step 69: 29104 + 428 = 29532
Step 70: 29532 + 428 = 29960
Step 71: 29960 + 428 = 30388
Step 72: 30388 + 428 = 30816
Step 73: 30816 + 428 = 31244
Step 74: 31244 + 428 = 31672
Step 75: 31672 + 428 = 32100
Step 76: 32100 + 428 = 32528
Step 77: 32528 + 428 = 32956
Step 78: 32956 + 428 = 33384
Step 79: 33384 + 428 = 33812
Step 80: 33812 + 428 = 34240
Step 81: 34240 + 428 = 34668
Step 82: 34668 + 428 = 35096
Step 83: 35096 + 428 = 35524
Step 84: 35524 + 428 = 35952
Step 85: 35952 + 428 = 36380
Step 86: 36380 + 428 = 36808
Step 87: 36808 + 428 = 37236
Step 88: 37236 + 428 = 37664
Step 89: 37664 + 428 = 38092
Step 90: 38092 + 428 = 38520
Step 91: 38520 + 428 = 38948
Step 92: 38948 + 428 = 39376
Step 93: 39376 + 428 = 39804
Step 94: 39804 + 428 = 40232
Step 95: 40232 + 428 = 40660
Step 96: 40660 + 428 = 41088
Step 97: 41088 + 428 = 41516
Step 98: 41516 + 428 = 41944
Step 99: 41944 + 428 = 42372
Step 100: 42372 + 428 = 42800
Step 101: 42800 + 428 = 43228
Step 102: 43228 + 428 = 43656
Step 103: 43656 + 428 = 44084
Step 104: 44084 + 428 = 44512
Step 105: 44512 + 428 = 44940
Step 106: 44940 + 428 = 45368
Step 107: 45368 + 428 = 45796
Step 108: 45796 + 428 = 46224
Step 109: 46224 + 428 = 46652
Step 110: 46652 + 428 = 47080
Step 111: 47080 + 428 = 47508
Step 112: 47508 + 428 = 47936
Step 113: 47936 + 428 = 48364
Step 114: 48364 + 428 = 48792
Step 115: 48792 + 428 = 49220
Step 116: 49220 + 428 = 49648
Step 117: 49648 + 428 = 50076
Step 118: 50076 + 428 = 50504
Step 119: 50504 + 428 = 50932
Step 120: 50932 + 428 = 51360
Step 121: 51360 + 428 = 51788
Step 122: 51788 + 428 = 52216
Step 123: 52216 + 428 = 52644
Step 124: 52644 + 428 = 53072
Step 125: 53072 + 428 = 53500
Step 126: 53500 + 428 = 53928
Step 127: 53928 + 428 = 54356
Step 128: 54356 + 428 = 54784
Step 129: 54784 + 428 = 55212
Step 130: 55212 + 428 = 55640
Step 131: 55640 + 428 = 56068
Step 132: 56068 + 428 = 56496
Step 133: 56496 + 428 = 56924
Step 134: 56924 + 428 = 57352
Step 135: 57352 + 428 = 57780
Step 136: 57780 + 428 = 58208
Step 137: 58208 + 428 = 58636
Step 138: 58636 + 428 = 59064
Step 139: 59064 + 428 = 59492
Step 140: 59492 + 428 = 59920
Step 141: 59920 + 428 = 60348
Step 142: 60348 + 428 = 60776
Step 143: 60776 + 428 = 61204
Step 144: 61204 + 428 = 61632
Step 145: 61632 + 428 = 62060
Step 146: 62060 + 428 = 62488
Step 147: 62488 + 428 = 62916
Step 148: 62916 + 428 = 63344
Step 149: 63344 + 428 = 63772
Step 150: 63772 + 428 = 64200
Step 151: 64200 + 428 = 64628
Step 152: 64628 + 428 = 65056
Step 153: 65056 + 428 = 65484
Step 154: 65484 + 428 = 65912
Step 155: 65912 + 428 = 66340
Step 156: 66340 + 428 = 66768
Step 157: 66768 + 428 = 67196
Step 158: 67196 + 428 = 67624
Step 159: 67624 + 428 = 68052
Step 160: 68052 + 428 = 68480
Step 161: 68480 + 428 = 68908
Step 162: 68908 + 428 = 69336
Step 163: 69336 + 428 = 69764
Step 164: 69764 + 428 = 70192
Step 165: 70192 + 428 = 70620
Step 166: 70620 + 428 = 71048
Step 167: 71048 + 428 = 71476
Step 168: 71476 + 428 = 71904
Step 169: 71904 + 428 = 72332
Step 170: 72332 + 428 = 72760
Step 171: 72760 + 428 = 73188
Step 172: 73188 + 428 = 73616
Step 173: 73616 + 428 = 74044
Step 174: 74044 + 428 = 74472
Step 175: 74472 + 428 = 74900
Step 176: 74900 + 428 = 75328
Step 177: 75328 + 428 = 75756
Step 178: 75756 + 428 = 76184
Step 179: 76184 + 428 = 76612
Step 180: 76612 + 428 = 77040
Step 181: 77040 + 428 = 77468
Step 182: 77468 + 428 = 77896
Step 183: 77896 + 428 = 78324
Step 184: 78324 + 428 = 78752
Step 185: 78752 + 428 = 79180
Step 186: 79180 + 428 = 79608
Step 187: 79608 + 428 = 80036
Step 188: 80036 + 428 = 80464
Step 189: 80464 + 428 = 80892
Step 190: 80892 + 428 = 81320
Step 191: 81320 + 428 = 81748
Step 192: 81748 + 428 = 82176
Step 193: 82176 + 428 = 82604
Step 194: 82604 + 428 = 83032
Step 195: 83032 + 428 = 83460
Step 196: 83460 + 428 = 83888
Step 197: 83888 + 428 = 84316
Step 198: 84316 + 428 = 84744
Step 199: 84744 + 428 = 85172
Step 200: 85172 + 428 = 85600
Step 201: 85600 + 428 = 86028
Step 202: 86028 + 428 = 86456
Step 203: 86456 + 428 = 86884
Step 204: 86884 + 428 = 87312
Step 205: 87312 + 428 = 87740
Step 206: 87740 + 428 = 88168
Step 207: 88168 + 428 = 88596
Step 208: 88596 + 428 = 89024
Step 209: 89024 + 428 = 89452
Step 210: 89452 + 428 = 89880
Step 211: 89880 + 428 = 90308
Step 212: 90308 + 428 = 90736
Step 213: 90736 + 428 = 91164
Step 214: 91164 + 428 = 91592
Step 215: 91592 + 428 = 92020
Step 216: 92020 + 428 = 92448
Step 217: 92448 + 428 = 92876
Step 218: 92876 + 428 = 93304
Step 219: 93304 + 428 = 93732
Step 220: 93732 + 428 = 94160
Step 221: 94160 + 428 = 94588
Step 222: 94588 + 428 = 95016
Step 223: 95016 + 428 = 95444
Step 224: 95444 + 428 = 95872
Step 225: 95872 + 428 = 96300
Step 226: 96300 + 428 = 96728
Step 227: 96728 + 428 = 97156
Step 228: 97156 + 428 = 97584
Step 229: 97584 + 428 = 98012
Step 230: 98012 + 428 = 98440
Step 231: 98440 + 428 = 98868
Step 232: 98868 + 428 = 99296
Step 233: 99296 + 428 = 99724
Step 234: 99724 + 428 = 100152
Step 235: 100152 + 428 = 100580
Step 236: 100580 + 428 = 101008
Step 237: 101008 + 428 = 101436
Step 238: 101436 + 428 = 101864
Step 239: 101864 + 428 = 102292
Step 240: 102292 + 428 = 102720
Step 241: 102720 + 428 = 103148
Step 242: 103148 + 428 = 103576
Step 243: 103576 + 428 = 104004
Step 244: 104004 + 428 = 104432
Step 245: 104432 + 428 = 104860
Step 246: 104860 + 428 = 105288
Step 247: 105288 + 428 = 105716
Step 248: 105716 + 428 = 106144
Step 249: 106144 + 428 = 106572
Step 250: 106572 + 428 = 107000
Step 251: 107000 + 428 = 107428
Step 252: 107428 + 428 = 107856
Step 253: 107856 + 428 = 108284
Step 254: 108284 + 428 = 108712
Step 255: 108712 + 428 = 109140
Step 256: 109140 + 428 = 109568
Step 257: 109568 + 428 = 109996
Step 258: 109996 + 428 = 110424
Step 259: 110424 + 428 = 110852
Step 260: 110852 + 428 = 111280
Step 261: 111280 + 428 = 111708
Step 262: 111708 + 428 = 112136
Step 263: 112136 + 428 = 112564
Step 264: 112564 + 428 = 112992
Step 265: 112992 + 428 = 113420
Step 266: 113420 + 428 = 113848
Step 267: 113848 + 428 = 114276
Step 268: 114276 + 428 = 114704
Step 269: 114704 + 428 = 115132
Step 270: 115132 + 428 = 115560
Step 271: 115560 + 428 = 115988
Step 272: 115988 + 428 = 116416
Step 273: 116416 + 428 = 116844
Step 274: 116844 + 428 = 117272
Step 275: 117272 + 428 = 117700
Step 276: 117700 + 428 = 118128
Step 277: 118128 + 428 = 118556
Step 278: 118556 + 428 = 118984
Step 279: 118984 + 428 = 119412
Step 280: 119412 + 428 = 119840
Step 281: 119840 + 428 = 120268
Step 282: 120268 + 428 = 120696
Step 283: 120696 + 428 = 121124
Step 284: 121124 + 428 = 121552
Step 285: 121552 + 428 = 121980
Step 286: 121980 + 428 = 122408
Step 287: 122408 + 428 = 122836
Step 288: 122836 + 428 = 123264
Step 289: 123264 + 428 = 123692
Step 290: 123692 + 428 = 124120
Step 291: 124120 + 428 = 124548
Step 292: 124548 + 428 = 124976
Step 293: 124976 + 428 = 125404
Step 294: 125404 + 428 = 125832
Step 295: 125832 + 428 = 126260
Step 296: 126260 + 428 = 126688
Step 297: 126688 + 428 = 127116
Step 298: 127116 + 428 = 127544
Step 299: 127544 + 428 = 127972
Step 300: 127972 + 428 = 128400
Step 301: 128400 + 428 = 128828
Step 302: 128828 + 428 = 129256
Step 303: 129256 + 428 = 129684
Step 304: 129684 + 428 = 130112
Step 305: 130112 + 428 = 130540
Step 306: 130540 + 428 = 130968
Step 307: 130968 + 428 = 131396
Step 308: 131396 + 428 = 131824
Step 309: 131824 + 428 = 132252
Step 310: 132252 + 428 = 132680
Step 311: 132680 + 428 = 133108
Step 312: 133108 + 428 = 133536
Step 313: 133536 + 428 = 133964
Step 314: 133964 + 428 = 134392
Step 315: 134392 + 428 = 134820
Step 316: 134820 + 428 = 135248
Step 317: 135248 + 428 = 135676
Step 318: 135676 + 428 = 136104
Step 319: 136104 + 428 = 136532
Step 320: 136532 + 428 = 136960
Step 321: 136960 + 428 = 137388
Step 322: 137388 + 428 = 137816
Step 323: 137816 + 428 = 138244
Step 324: 138244 + 428 = 138672
Step 325: 138672 + 428 = 139100
Step 326: 139100 + 428 = 139528
Step 327: 139528 + 428 = 139956
Step 328: 139956 + 428 = 140384
Step 329: 140384 + 428 = 140812
Step 330: 140812 + 428 = 141240
Step 331: 141240 + 428 = 141668
Step 332: 141668 + 428 = 142096
Step 333: 142096 + 428 = 142524
Step 334: 142524 + 428 = 142952
Step 335: 142952 + 428 = 143380
Step 336: 143380 + 428 = 143808
Step 337: 143808 + 428 = 144236
Step 338: 144236 + 428 = 144664
Step 339: 144664 + 428 = 145092
Step 340: 145092 + 428 = 145520
Step 341: 145520 + 428 = 145948
Step 342: 145948 + 428 = 146376
Step 343: 146376 + 428 = 146804
Step 344: 146804 + 428 = 147232
Step 345: 147232 + 428 = 147660
Step 346: 147660 + 428 = 148088
Step 347: 148088 + 428 = 148516
Step 348: 148516 + 428 = 148944
Step 349: 148944 + 428 = 149372
Step 350: 149372 + 428 = 149800
Step 351: 149800 + 428 = 150228

So, 428*351 = 150228