Alright, let's solve this math problem step by step. First, we have the number 426. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 406. So, we're going to take the number 426 and add it to itself 406 times.
Step 1: 0 + 426 = 426
Step 2: 426 + 426 = 852
Step 3: 852 + 426 = 1278
Step 4: 1278 + 426 = 1704
Step 5: 1704 + 426 = 2130
Step 6: 2130 + 426 = 2556
Step 7: 2556 + 426 = 2982
Step 8: 2982 + 426 = 3408
Step 9: 3408 + 426 = 3834
Step 10: 3834 + 426 = 4260
Step 11: 4260 + 426 = 4686
Step 12: 4686 + 426 = 5112
Step 13: 5112 + 426 = 5538
Step 14: 5538 + 426 = 5964
Step 15: 5964 + 426 = 6390
Step 16: 6390 + 426 = 6816
Step 17: 6816 + 426 = 7242
Step 18: 7242 + 426 = 7668
Step 19: 7668 + 426 = 8094
Step 20: 8094 + 426 = 8520
Step 21: 8520 + 426 = 8946
Step 22: 8946 + 426 = 9372
Step 23: 9372 + 426 = 9798
Step 24: 9798 + 426 = 10224
Step 25: 10224 + 426 = 10650
Step 26: 10650 + 426 = 11076
Step 27: 11076 + 426 = 11502
Step 28: 11502 + 426 = 11928
Step 29: 11928 + 426 = 12354
Step 30: 12354 + 426 = 12780
Step 31: 12780 + 426 = 13206
Step 32: 13206 + 426 = 13632
Step 33: 13632 + 426 = 14058
Step 34: 14058 + 426 = 14484
Step 35: 14484 + 426 = 14910
Step 36: 14910 + 426 = 15336
Step 37: 15336 + 426 = 15762
Step 38: 15762 + 426 = 16188
Step 39: 16188 + 426 = 16614
Step 40: 16614 + 426 = 17040
Step 41: 17040 + 426 = 17466
Step 42: 17466 + 426 = 17892
Step 43: 17892 + 426 = 18318
Step 44: 18318 + 426 = 18744
Step 45: 18744 + 426 = 19170
Step 46: 19170 + 426 = 19596
Step 47: 19596 + 426 = 20022
Step 48: 20022 + 426 = 20448
Step 49: 20448 + 426 = 20874
Step 50: 20874 + 426 = 21300
Step 51: 21300 + 426 = 21726
Step 52: 21726 + 426 = 22152
Step 53: 22152 + 426 = 22578
Step 54: 22578 + 426 = 23004
Step 55: 23004 + 426 = 23430
Step 56: 23430 + 426 = 23856
Step 57: 23856 + 426 = 24282
Step 58: 24282 + 426 = 24708
Step 59: 24708 + 426 = 25134
Step 60: 25134 + 426 = 25560
Step 61: 25560 + 426 = 25986
Step 62: 25986 + 426 = 26412
Step 63: 26412 + 426 = 26838
Step 64: 26838 + 426 = 27264
Step 65: 27264 + 426 = 27690
Step 66: 27690 + 426 = 28116
Step 67: 28116 + 426 = 28542
Step 68: 28542 + 426 = 28968
Step 69: 28968 + 426 = 29394
Step 70: 29394 + 426 = 29820
Step 71: 29820 + 426 = 30246
Step 72: 30246 + 426 = 30672
Step 73: 30672 + 426 = 31098
Step 74: 31098 + 426 = 31524
Step 75: 31524 + 426 = 31950
Step 76: 31950 + 426 = 32376
Step 77: 32376 + 426 = 32802
Step 78: 32802 + 426 = 33228
Step 79: 33228 + 426 = 33654
Step 80: 33654 + 426 = 34080
Step 81: 34080 + 426 = 34506
Step 82: 34506 + 426 = 34932
Step 83: 34932 + 426 = 35358
Step 84: 35358 + 426 = 35784
Step 85: 35784 + 426 = 36210
Step 86: 36210 + 426 = 36636
Step 87: 36636 + 426 = 37062
Step 88: 37062 + 426 = 37488
Step 89: 37488 + 426 = 37914
Step 90: 37914 + 426 = 38340
Step 91: 38340 + 426 = 38766
Step 92: 38766 + 426 = 39192
Step 93: 39192 + 426 = 39618
Step 94: 39618 + 426 = 40044
Step 95: 40044 + 426 = 40470
Step 96: 40470 + 426 = 40896
Step 97: 40896 + 426 = 41322
Step 98: 41322 + 426 = 41748
Step 99: 41748 + 426 = 42174
Step 100: 42174 + 426 = 42600
Step 101: 42600 + 426 = 43026
Step 102: 43026 + 426 = 43452
Step 103: 43452 + 426 = 43878
Step 104: 43878 + 426 = 44304
Step 105: 44304 + 426 = 44730
Step 106: 44730 + 426 = 45156
Step 107: 45156 + 426 = 45582
Step 108: 45582 + 426 = 46008
Step 109: 46008 + 426 = 46434
Step 110: 46434 + 426 = 46860
Step 111: 46860 + 426 = 47286
Step 112: 47286 + 426 = 47712
Step 113: 47712 + 426 = 48138
Step 114: 48138 + 426 = 48564
Step 115: 48564 + 426 = 48990
Step 116: 48990 + 426 = 49416
Step 117: 49416 + 426 = 49842
Step 118: 49842 + 426 = 50268
Step 119: 50268 + 426 = 50694
Step 120: 50694 + 426 = 51120
Step 121: 51120 + 426 = 51546
Step 122: 51546 + 426 = 51972
Step 123: 51972 + 426 = 52398
Step 124: 52398 + 426 = 52824
Step 125: 52824 + 426 = 53250
Step 126: 53250 + 426 = 53676
Step 127: 53676 + 426 = 54102
Step 128: 54102 + 426 = 54528
Step 129: 54528 + 426 = 54954
Step 130: 54954 + 426 = 55380
Step 131: 55380 + 426 = 55806
Step 132: 55806 + 426 = 56232
Step 133: 56232 + 426 = 56658
Step 134: 56658 + 426 = 57084
Step 135: 57084 + 426 = 57510
Step 136: 57510 + 426 = 57936
Step 137: 57936 + 426 = 58362
Step 138: 58362 + 426 = 58788
Step 139: 58788 + 426 = 59214
Step 140: 59214 + 426 = 59640
Step 141: 59640 + 426 = 60066
Step 142: 60066 + 426 = 60492
Step 143: 60492 + 426 = 60918
Step 144: 60918 + 426 = 61344
Step 145: 61344 + 426 = 61770
Step 146: 61770 + 426 = 62196
Step 147: 62196 + 426 = 62622
Step 148: 62622 + 426 = 63048
Step 149: 63048 + 426 = 63474
Step 150: 63474 + 426 = 63900
Step 151: 63900 + 426 = 64326
Step 152: 64326 + 426 = 64752
Step 153: 64752 + 426 = 65178
Step 154: 65178 + 426 = 65604
Step 155: 65604 + 426 = 66030
Step 156: 66030 + 426 = 66456
Step 157: 66456 + 426 = 66882
Step 158: 66882 + 426 = 67308
Step 159: 67308 + 426 = 67734
Step 160: 67734 + 426 = 68160
Step 161: 68160 + 426 = 68586
Step 162: 68586 + 426 = 69012
Step 163: 69012 + 426 = 69438
Step 164: 69438 + 426 = 69864
Step 165: 69864 + 426 = 70290
Step 166: 70290 + 426 = 70716
Step 167: 70716 + 426 = 71142
Step 168: 71142 + 426 = 71568
Step 169: 71568 + 426 = 71994
Step 170: 71994 + 426 = 72420
Step 171: 72420 + 426 = 72846
Step 172: 72846 + 426 = 73272
Step 173: 73272 + 426 = 73698
Step 174: 73698 + 426 = 74124
Step 175: 74124 + 426 = 74550
Step 176: 74550 + 426 = 74976
Step 177: 74976 + 426 = 75402
Step 178: 75402 + 426 = 75828
Step 179: 75828 + 426 = 76254
Step 180: 76254 + 426 = 76680
Step 181: 76680 + 426 = 77106
Step 182: 77106 + 426 = 77532
Step 183: 77532 + 426 = 77958
Step 184: 77958 + 426 = 78384
Step 185: 78384 + 426 = 78810
Step 186: 78810 + 426 = 79236
Step 187: 79236 + 426 = 79662
Step 188: 79662 + 426 = 80088
Step 189: 80088 + 426 = 80514
Step 190: 80514 + 426 = 80940
Step 191: 80940 + 426 = 81366
Step 192: 81366 + 426 = 81792
Step 193: 81792 + 426 = 82218
Step 194: 82218 + 426 = 82644
Step 195: 82644 + 426 = 83070
Step 196: 83070 + 426 = 83496
Step 197: 83496 + 426 = 83922
Step 198: 83922 + 426 = 84348
Step 199: 84348 + 426 = 84774
Step 200: 84774 + 426 = 85200
Step 201: 85200 + 426 = 85626
Step 202: 85626 + 426 = 86052
Step 203: 86052 + 426 = 86478
Step 204: 86478 + 426 = 86904
Step 205: 86904 + 426 = 87330
Step 206: 87330 + 426 = 87756
Step 207: 87756 + 426 = 88182
Step 208: 88182 + 426 = 88608
Step 209: 88608 + 426 = 89034
Step 210: 89034 + 426 = 89460
Step 211: 89460 + 426 = 89886
Step 212: 89886 + 426 = 90312
Step 213: 90312 + 426 = 90738
Step 214: 90738 + 426 = 91164
Step 215: 91164 + 426 = 91590
Step 216: 91590 + 426 = 92016
Step 217: 92016 + 426 = 92442
Step 218: 92442 + 426 = 92868
Step 219: 92868 + 426 = 93294
Step 220: 93294 + 426 = 93720
Step 221: 93720 + 426 = 94146
Step 222: 94146 + 426 = 94572
Step 223: 94572 + 426 = 94998
Step 224: 94998 + 426 = 95424
Step 225: 95424 + 426 = 95850
Step 226: 95850 + 426 = 96276
Step 227: 96276 + 426 = 96702
Step 228: 96702 + 426 = 97128
Step 229: 97128 + 426 = 97554
Step 230: 97554 + 426 = 97980
Step 231: 97980 + 426 = 98406
Step 232: 98406 + 426 = 98832
Step 233: 98832 + 426 = 99258
Step 234: 99258 + 426 = 99684
Step 235: 99684 + 426 = 100110
Step 236: 100110 + 426 = 100536
Step 237: 100536 + 426 = 100962
Step 238: 100962 + 426 = 101388
Step 239: 101388 + 426 = 101814
Step 240: 101814 + 426 = 102240
Step 241: 102240 + 426 = 102666
Step 242: 102666 + 426 = 103092
Step 243: 103092 + 426 = 103518
Step 244: 103518 + 426 = 103944
Step 245: 103944 + 426 = 104370
Step 246: 104370 + 426 = 104796
Step 247: 104796 + 426 = 105222
Step 248: 105222 + 426 = 105648
Step 249: 105648 + 426 = 106074
Step 250: 106074 + 426 = 106500
Step 251: 106500 + 426 = 106926
Step 252: 106926 + 426 = 107352
Step 253: 107352 + 426 = 107778
Step 254: 107778 + 426 = 108204
Step 255: 108204 + 426 = 108630
Step 256: 108630 + 426 = 109056
Step 257: 109056 + 426 = 109482
Step 258: 109482 + 426 = 109908
Step 259: 109908 + 426 = 110334
Step 260: 110334 + 426 = 110760
Step 261: 110760 + 426 = 111186
Step 262: 111186 + 426 = 111612
Step 263: 111612 + 426 = 112038
Step 264: 112038 + 426 = 112464
Step 265: 112464 + 426 = 112890
Step 266: 112890 + 426 = 113316
Step 267: 113316 + 426 = 113742
Step 268: 113742 + 426 = 114168
Step 269: 114168 + 426 = 114594
Step 270: 114594 + 426 = 115020
Step 271: 115020 + 426 = 115446
Step 272: 115446 + 426 = 115872
Step 273: 115872 + 426 = 116298
Step 274: 116298 + 426 = 116724
Step 275: 116724 + 426 = 117150
Step 276: 117150 + 426 = 117576
Step 277: 117576 + 426 = 118002
Step 278: 118002 + 426 = 118428
Step 279: 118428 + 426 = 118854
Step 280: 118854 + 426 = 119280
Step 281: 119280 + 426 = 119706
Step 282: 119706 + 426 = 120132
Step 283: 120132 + 426 = 120558
Step 284: 120558 + 426 = 120984
Step 285: 120984 + 426 = 121410
Step 286: 121410 + 426 = 121836
Step 287: 121836 + 426 = 122262
Step 288: 122262 + 426 = 122688
Step 289: 122688 + 426 = 123114
Step 290: 123114 + 426 = 123540
Step 291: 123540 + 426 = 123966
Step 292: 123966 + 426 = 124392
Step 293: 124392 + 426 = 124818
Step 294: 124818 + 426 = 125244
Step 295: 125244 + 426 = 125670
Step 296: 125670 + 426 = 126096
Step 297: 126096 + 426 = 126522
Step 298: 126522 + 426 = 126948
Step 299: 126948 + 426 = 127374
Step 300: 127374 + 426 = 127800
Step 301: 127800 + 426 = 128226
Step 302: 128226 + 426 = 128652
Step 303: 128652 + 426 = 129078
Step 304: 129078 + 426 = 129504
Step 305: 129504 + 426 = 129930
Step 306: 129930 + 426 = 130356
Step 307: 130356 + 426 = 130782
Step 308: 130782 + 426 = 131208
Step 309: 131208 + 426 = 131634
Step 310: 131634 + 426 = 132060
Step 311: 132060 + 426 = 132486
Step 312: 132486 + 426 = 132912
Step 313: 132912 + 426 = 133338
Step 314: 133338 + 426 = 133764
Step 315: 133764 + 426 = 134190
Step 316: 134190 + 426 = 134616
Step 317: 134616 + 426 = 135042
Step 318: 135042 + 426 = 135468
Step 319: 135468 + 426 = 135894
Step 320: 135894 + 426 = 136320
Step 321: 136320 + 426 = 136746
Step 322: 136746 + 426 = 137172
Step 323: 137172 + 426 = 137598
Step 324: 137598 + 426 = 138024
Step 325: 138024 + 426 = 138450
Step 326: 138450 + 426 = 138876
Step 327: 138876 + 426 = 139302
Step 328: 139302 + 426 = 139728
Step 329: 139728 + 426 = 140154
Step 330: 140154 + 426 = 140580
Step 331: 140580 + 426 = 141006
Step 332: 141006 + 426 = 141432
Step 333: 141432 + 426 = 141858
Step 334: 141858 + 426 = 142284
Step 335: 142284 + 426 = 142710
Step 336: 142710 + 426 = 143136
Step 337: 143136 + 426 = 143562
Step 338: 143562 + 426 = 143988
Step 339: 143988 + 426 = 144414
Step 340: 144414 + 426 = 144840
Step 341: 144840 + 426 = 145266
Step 342: 145266 + 426 = 145692
Step 343: 145692 + 426 = 146118
Step 344: 146118 + 426 = 146544
Step 345: 146544 + 426 = 146970
Step 346: 146970 + 426 = 147396
Step 347: 147396 + 426 = 147822
Step 348: 147822 + 426 = 148248
Step 349: 148248 + 426 = 148674
Step 350: 148674 + 426 = 149100
Step 351: 149100 + 426 = 149526
Step 352: 149526 + 426 = 149952
Step 353: 149952 + 426 = 150378
Step 354: 150378 + 426 = 150804
Step 355: 150804 + 426 = 151230
Step 356: 151230 + 426 = 151656
Step 357: 151656 + 426 = 152082
Step 358: 152082 + 426 = 152508
Step 359: 152508 + 426 = 152934
Step 360: 152934 + 426 = 153360
Step 361: 153360 + 426 = 153786
Step 362: 153786 + 426 = 154212
Step 363: 154212 + 426 = 154638
Step 364: 154638 + 426 = 155064
Step 365: 155064 + 426 = 155490
Step 366: 155490 + 426 = 155916
Step 367: 155916 + 426 = 156342
Step 368: 156342 + 426 = 156768
Step 369: 156768 + 426 = 157194
Step 370: 157194 + 426 = 157620
Step 371: 157620 + 426 = 158046
Step 372: 158046 + 426 = 158472
Step 373: 158472 + 426 = 158898
Step 374: 158898 + 426 = 159324
Step 375: 159324 + 426 = 159750
Step 376: 159750 + 426 = 160176
Step 377: 160176 + 426 = 160602
Step 378: 160602 + 426 = 161028
Step 379: 161028 + 426 = 161454
Step 380: 161454 + 426 = 161880
Step 381: 161880 + 426 = 162306
Step 382: 162306 + 426 = 162732
Step 383: 162732 + 426 = 163158
Step 384: 163158 + 426 = 163584
Step 385: 163584 + 426 = 164010
Step 386: 164010 + 426 = 164436
Step 387: 164436 + 426 = 164862
Step 388: 164862 + 426 = 165288
Step 389: 165288 + 426 = 165714
Step 390: 165714 + 426 = 166140
Step 391: 166140 + 426 = 166566
Step 392: 166566 + 426 = 166992
Step 393: 166992 + 426 = 167418
Step 394: 167418 + 426 = 167844
Step 395: 167844 + 426 = 168270
Step 396: 168270 + 426 = 168696
Step 397: 168696 + 426 = 169122
Step 398: 169122 + 426 = 169548
Step 399: 169548 + 426 = 169974
Step 400: 169974 + 426 = 170400
Step 401: 170400 + 426 = 170826
Step 402: 170826 + 426 = 171252
Step 403: 171252 + 426 = 171678
Step 404: 171678 + 426 = 172104
Step 405: 172104 + 426 = 172530
Step 406: 172530 + 426 = 172956

So, 426*406 = 172956