Alright, let's solve this math problem step by step. First, we have the number 821. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 429. So, we're going to take the number 821 and add it to itself 429 times.
Step 1: 0 + 821 = 821
Step 2: 821 + 821 = 1642
Step 3: 1642 + 821 = 2463
Step 4: 2463 + 821 = 3284
Step 5: 3284 + 821 = 4105
Step 6: 4105 + 821 = 4926
Step 7: 4926 + 821 = 5747
Step 8: 5747 + 821 = 6568
Step 9: 6568 + 821 = 7389
Step 10: 7389 + 821 = 8210
Step 11: 8210 + 821 = 9031
Step 12: 9031 + 821 = 9852
Step 13: 9852 + 821 = 10673
Step 14: 10673 + 821 = 11494
Step 15: 11494 + 821 = 12315
Step 16: 12315 + 821 = 13136
Step 17: 13136 + 821 = 13957
Step 18: 13957 + 821 = 14778
Step 19: 14778 + 821 = 15599
Step 20: 15599 + 821 = 16420
Step 21: 16420 + 821 = 17241
Step 22: 17241 + 821 = 18062
Step 23: 18062 + 821 = 18883
Step 24: 18883 + 821 = 19704
Step 25: 19704 + 821 = 20525
Step 26: 20525 + 821 = 21346
Step 27: 21346 + 821 = 22167
Step 28: 22167 + 821 = 22988
Step 29: 22988 + 821 = 23809
Step 30: 23809 + 821 = 24630
Step 31: 24630 + 821 = 25451
Step 32: 25451 + 821 = 26272
Step 33: 26272 + 821 = 27093
Step 34: 27093 + 821 = 27914
Step 35: 27914 + 821 = 28735
Step 36: 28735 + 821 = 29556
Step 37: 29556 + 821 = 30377
Step 38: 30377 + 821 = 31198
Step 39: 31198 + 821 = 32019
Step 40: 32019 + 821 = 32840
Step 41: 32840 + 821 = 33661
Step 42: 33661 + 821 = 34482
Step 43: 34482 + 821 = 35303
Step 44: 35303 + 821 = 36124
Step 45: 36124 + 821 = 36945
Step 46: 36945 + 821 = 37766
Step 47: 37766 + 821 = 38587
Step 48: 38587 + 821 = 39408
Step 49: 39408 + 821 = 40229
Step 50: 40229 + 821 = 41050
Step 51: 41050 + 821 = 41871
Step 52: 41871 + 821 = 42692
Step 53: 42692 + 821 = 43513
Step 54: 43513 + 821 = 44334
Step 55: 44334 + 821 = 45155
Step 56: 45155 + 821 = 45976
Step 57: 45976 + 821 = 46797
Step 58: 46797 + 821 = 47618
Step 59: 47618 + 821 = 48439
Step 60: 48439 + 821 = 49260
Step 61: 49260 + 821 = 50081
Step 62: 50081 + 821 = 50902
Step 63: 50902 + 821 = 51723
Step 64: 51723 + 821 = 52544
Step 65: 52544 + 821 = 53365
Step 66: 53365 + 821 = 54186
Step 67: 54186 + 821 = 55007
Step 68: 55007 + 821 = 55828
Step 69: 55828 + 821 = 56649
Step 70: 56649 + 821 = 57470
Step 71: 57470 + 821 = 58291
Step 72: 58291 + 821 = 59112
Step 73: 59112 + 821 = 59933
Step 74: 59933 + 821 = 60754
Step 75: 60754 + 821 = 61575
Step 76: 61575 + 821 = 62396
Step 77: 62396 + 821 = 63217
Step 78: 63217 + 821 = 64038
Step 79: 64038 + 821 = 64859
Step 80: 64859 + 821 = 65680
Step 81: 65680 + 821 = 66501
Step 82: 66501 + 821 = 67322
Step 83: 67322 + 821 = 68143
Step 84: 68143 + 821 = 68964
Step 85: 68964 + 821 = 69785
Step 86: 69785 + 821 = 70606
Step 87: 70606 + 821 = 71427
Step 88: 71427 + 821 = 72248
Step 89: 72248 + 821 = 73069
Step 90: 73069 + 821 = 73890
Step 91: 73890 + 821 = 74711
Step 92: 74711 + 821 = 75532
Step 93: 75532 + 821 = 76353
Step 94: 76353 + 821 = 77174
Step 95: 77174 + 821 = 77995
Step 96: 77995 + 821 = 78816
Step 97: 78816 + 821 = 79637
Step 98: 79637 + 821 = 80458
Step 99: 80458 + 821 = 81279
Step 100: 81279 + 821 = 82100
Step 101: 82100 + 821 = 82921
Step 102: 82921 + 821 = 83742
Step 103: 83742 + 821 = 84563
Step 104: 84563 + 821 = 85384
Step 105: 85384 + 821 = 86205
Step 106: 86205 + 821 = 87026
Step 107: 87026 + 821 = 87847
Step 108: 87847 + 821 = 88668
Step 109: 88668 + 821 = 89489
Step 110: 89489 + 821 = 90310
Step 111: 90310 + 821 = 91131
Step 112: 91131 + 821 = 91952
Step 113: 91952 + 821 = 92773
Step 114: 92773 + 821 = 93594
Step 115: 93594 + 821 = 94415
Step 116: 94415 + 821 = 95236
Step 117: 95236 + 821 = 96057
Step 118: 96057 + 821 = 96878
Step 119: 96878 + 821 = 97699
Step 120: 97699 + 821 = 98520
Step 121: 98520 + 821 = 99341
Step 122: 99341 + 821 = 100162
Step 123: 100162 + 821 = 100983
Step 124: 100983 + 821 = 101804
Step 125: 101804 + 821 = 102625
Step 126: 102625 + 821 = 103446
Step 127: 103446 + 821 = 104267
Step 128: 104267 + 821 = 105088
Step 129: 105088 + 821 = 105909
Step 130: 105909 + 821 = 106730
Step 131: 106730 + 821 = 107551
Step 132: 107551 + 821 = 108372
Step 133: 108372 + 821 = 109193
Step 134: 109193 + 821 = 110014
Step 135: 110014 + 821 = 110835
Step 136: 110835 + 821 = 111656
Step 137: 111656 + 821 = 112477
Step 138: 112477 + 821 = 113298
Step 139: 113298 + 821 = 114119
Step 140: 114119 + 821 = 114940
Step 141: 114940 + 821 = 115761
Step 142: 115761 + 821 = 116582
Step 143: 116582 + 821 = 117403
Step 144: 117403 + 821 = 118224
Step 145: 118224 + 821 = 119045
Step 146: 119045 + 821 = 119866
Step 147: 119866 + 821 = 120687
Step 148: 120687 + 821 = 121508
Step 149: 121508 + 821 = 122329
Step 150: 122329 + 821 = 123150
Step 151: 123150 + 821 = 123971
Step 152: 123971 + 821 = 124792
Step 153: 124792 + 821 = 125613
Step 154: 125613 + 821 = 126434
Step 155: 126434 + 821 = 127255
Step 156: 127255 + 821 = 128076
Step 157: 128076 + 821 = 128897
Step 158: 128897 + 821 = 129718
Step 159: 129718 + 821 = 130539
Step 160: 130539 + 821 = 131360
Step 161: 131360 + 821 = 132181
Step 162: 132181 + 821 = 133002
Step 163: 133002 + 821 = 133823
Step 164: 133823 + 821 = 134644
Step 165: 134644 + 821 = 135465
Step 166: 135465 + 821 = 136286
Step 167: 136286 + 821 = 137107
Step 168: 137107 + 821 = 137928
Step 169: 137928 + 821 = 138749
Step 170: 138749 + 821 = 139570
Step 171: 139570 + 821 = 140391
Step 172: 140391 + 821 = 141212
Step 173: 141212 + 821 = 142033
Step 174: 142033 + 821 = 142854
Step 175: 142854 + 821 = 143675
Step 176: 143675 + 821 = 144496
Step 177: 144496 + 821 = 145317
Step 178: 145317 + 821 = 146138
Step 179: 146138 + 821 = 146959
Step 180: 146959 + 821 = 147780
Step 181: 147780 + 821 = 148601
Step 182: 148601 + 821 = 149422
Step 183: 149422 + 821 = 150243
Step 184: 150243 + 821 = 151064
Step 185: 151064 + 821 = 151885
Step 186: 151885 + 821 = 152706
Step 187: 152706 + 821 = 153527
Step 188: 153527 + 821 = 154348
Step 189: 154348 + 821 = 155169
Step 190: 155169 + 821 = 155990
Step 191: 155990 + 821 = 156811
Step 192: 156811 + 821 = 157632
Step 193: 157632 + 821 = 158453
Step 194: 158453 + 821 = 159274
Step 195: 159274 + 821 = 160095
Step 196: 160095 + 821 = 160916
Step 197: 160916 + 821 = 161737
Step 198: 161737 + 821 = 162558
Step 199: 162558 + 821 = 163379
Step 200: 163379 + 821 = 164200
Step 201: 164200 + 821 = 165021
Step 202: 165021 + 821 = 165842
Step 203: 165842 + 821 = 166663
Step 204: 166663 + 821 = 167484
Step 205: 167484 + 821 = 168305
Step 206: 168305 + 821 = 169126
Step 207: 169126 + 821 = 169947
Step 208: 169947 + 821 = 170768
Step 209: 170768 + 821 = 171589
Step 210: 171589 + 821 = 172410
Step 211: 172410 + 821 = 173231
Step 212: 173231 + 821 = 174052
Step 213: 174052 + 821 = 174873
Step 214: 174873 + 821 = 175694
Step 215: 175694 + 821 = 176515
Step 216: 176515 + 821 = 177336
Step 217: 177336 + 821 = 178157
Step 218: 178157 + 821 = 178978
Step 219: 178978 + 821 = 179799
Step 220: 179799 + 821 = 180620
Step 221: 180620 + 821 = 181441
Step 222: 181441 + 821 = 182262
Step 223: 182262 + 821 = 183083
Step 224: 183083 + 821 = 183904
Step 225: 183904 + 821 = 184725
Step 226: 184725 + 821 = 185546
Step 227: 185546 + 821 = 186367
Step 228: 186367 + 821 = 187188
Step 229: 187188 + 821 = 188009
Step 230: 188009 + 821 = 188830
Step 231: 188830 + 821 = 189651
Step 232: 189651 + 821 = 190472
Step 233: 190472 + 821 = 191293
Step 234: 191293 + 821 = 192114
Step 235: 192114 + 821 = 192935
Step 236: 192935 + 821 = 193756
Step 237: 193756 + 821 = 194577
Step 238: 194577 + 821 = 195398
Step 239: 195398 + 821 = 196219
Step 240: 196219 + 821 = 197040
Step 241: 197040 + 821 = 197861
Step 242: 197861 + 821 = 198682
Step 243: 198682 + 821 = 199503
Step 244: 199503 + 821 = 200324
Step 245: 200324 + 821 = 201145
Step 246: 201145 + 821 = 201966
Step 247: 201966 + 821 = 202787
Step 248: 202787 + 821 = 203608
Step 249: 203608 + 821 = 204429
Step 250: 204429 + 821 = 205250
Step 251: 205250 + 821 = 206071
Step 252: 206071 + 821 = 206892
Step 253: 206892 + 821 = 207713
Step 254: 207713 + 821 = 208534
Step 255: 208534 + 821 = 209355
Step 256: 209355 + 821 = 210176
Step 257: 210176 + 821 = 210997
Step 258: 210997 + 821 = 211818
Step 259: 211818 + 821 = 212639
Step 260: 212639 + 821 = 213460
Step 261: 213460 + 821 = 214281
Step 262: 214281 + 821 = 215102
Step 263: 215102 + 821 = 215923
Step 264: 215923 + 821 = 216744
Step 265: 216744 + 821 = 217565
Step 266: 217565 + 821 = 218386
Step 267: 218386 + 821 = 219207
Step 268: 219207 + 821 = 220028
Step 269: 220028 + 821 = 220849
Step 270: 220849 + 821 = 221670
Step 271: 221670 + 821 = 222491
Step 272: 222491 + 821 = 223312
Step 273: 223312 + 821 = 224133
Step 274: 224133 + 821 = 224954
Step 275: 224954 + 821 = 225775
Step 276: 225775 + 821 = 226596
Step 277: 226596 + 821 = 227417
Step 278: 227417 + 821 = 228238
Step 279: 228238 + 821 = 229059
Step 280: 229059 + 821 = 229880
Step 281: 229880 + 821 = 230701
Step 282: 230701 + 821 = 231522
Step 283: 231522 + 821 = 232343
Step 284: 232343 + 821 = 233164
Step 285: 233164 + 821 = 233985
Step 286: 233985 + 821 = 234806
Step 287: 234806 + 821 = 235627
Step 288: 235627 + 821 = 236448
Step 289: 236448 + 821 = 237269
Step 290: 237269 + 821 = 238090
Step 291: 238090 + 821 = 238911
Step 292: 238911 + 821 = 239732
Step 293: 239732 + 821 = 240553
Step 294: 240553 + 821 = 241374
Step 295: 241374 + 821 = 242195
Step 296: 242195 + 821 = 243016
Step 297: 243016 + 821 = 243837
Step 298: 243837 + 821 = 244658
Step 299: 244658 + 821 = 245479
Step 300: 245479 + 821 = 246300
Step 301: 246300 + 821 = 247121
Step 302: 247121 + 821 = 247942
Step 303: 247942 + 821 = 248763
Step 304: 248763 + 821 = 249584
Step 305: 249584 + 821 = 250405
Step 306: 250405 + 821 = 251226
Step 307: 251226 + 821 = 252047
Step 308: 252047 + 821 = 252868
Step 309: 252868 + 821 = 253689
Step 310: 253689 + 821 = 254510
Step 311: 254510 + 821 = 255331
Step 312: 255331 + 821 = 256152
Step 313: 256152 + 821 = 256973
Step 314: 256973 + 821 = 257794
Step 315: 257794 + 821 = 258615
Step 316: 258615 + 821 = 259436
Step 317: 259436 + 821 = 260257
Step 318: 260257 + 821 = 261078
Step 319: 261078 + 821 = 261899
Step 320: 261899 + 821 = 262720
Step 321: 262720 + 821 = 263541
Step 322: 263541 + 821 = 264362
Step 323: 264362 + 821 = 265183
Step 324: 265183 + 821 = 266004
Step 325: 266004 + 821 = 266825
Step 326: 266825 + 821 = 267646
Step 327: 267646 + 821 = 268467
Step 328: 268467 + 821 = 269288
Step 329: 269288 + 821 = 270109
Step 330: 270109 + 821 = 270930
Step 331: 270930 + 821 = 271751
Step 332: 271751 + 821 = 272572
Step 333: 272572 + 821 = 273393
Step 334: 273393 + 821 = 274214
Step 335: 274214 + 821 = 275035
Step 336: 275035 + 821 = 275856
Step 337: 275856 + 821 = 276677
Step 338: 276677 + 821 = 277498
Step 339: 277498 + 821 = 278319
Step 340: 278319 + 821 = 279140
Step 341: 279140 + 821 = 279961
Step 342: 279961 + 821 = 280782
Step 343: 280782 + 821 = 281603
Step 344: 281603 + 821 = 282424
Step 345: 282424 + 821 = 283245
Step 346: 283245 + 821 = 284066
Step 347: 284066 + 821 = 284887
Step 348: 284887 + 821 = 285708
Step 349: 285708 + 821 = 286529
Step 350: 286529 + 821 = 287350
Step 351: 287350 + 821 = 288171
Step 352: 288171 + 821 = 288992
Step 353: 288992 + 821 = 289813
Step 354: 289813 + 821 = 290634
Step 355: 290634 + 821 = 291455
Step 356: 291455 + 821 = 292276
Step 357: 292276 + 821 = 293097
Step 358: 293097 + 821 = 293918
Step 359: 293918 + 821 = 294739
Step 360: 294739 + 821 = 295560
Step 361: 295560 + 821 = 296381
Step 362: 296381 + 821 = 297202
Step 363: 297202 + 821 = 298023
Step 364: 298023 + 821 = 298844
Step 365: 298844 + 821 = 299665
Step 366: 299665 + 821 = 300486
Step 367: 300486 + 821 = 301307
Step 368: 301307 + 821 = 302128
Step 369: 302128 + 821 = 302949
Step 370: 302949 + 821 = 303770
Step 371: 303770 + 821 = 304591
Step 372: 304591 + 821 = 305412
Step 373: 305412 + 821 = 306233
Step 374: 306233 + 821 = 307054
Step 375: 307054 + 821 = 307875
Step 376: 307875 + 821 = 308696
Step 377: 308696 + 821 = 309517
Step 378: 309517 + 821 = 310338
Step 379: 310338 + 821 = 311159
Step 380: 311159 + 821 = 311980
Step 381: 311980 + 821 = 312801
Step 382: 312801 + 821 = 313622
Step 383: 313622 + 821 = 314443
Step 384: 314443 + 821 = 315264
Step 385: 315264 + 821 = 316085
Step 386: 316085 + 821 = 316906
Step 387: 316906 + 821 = 317727
Step 388: 317727 + 821 = 318548
Step 389: 318548 + 821 = 319369
Step 390: 319369 + 821 = 320190
Step 391: 320190 + 821 = 321011
Step 392: 321011 + 821 = 321832
Step 393: 321832 + 821 = 322653
Step 394: 322653 + 821 = 323474
Step 395: 323474 + 821 = 324295
Step 396: 324295 + 821 = 325116
Step 397: 325116 + 821 = 325937
Step 398: 325937 + 821 = 326758
Step 399: 326758 + 821 = 327579
Step 400: 327579 + 821 = 328400
Step 401: 328400 + 821 = 329221
Step 402: 329221 + 821 = 330042
Step 403: 330042 + 821 = 330863
Step 404: 330863 + 821 = 331684
Step 405: 331684 + 821 = 332505
Step 406: 332505 + 821 = 333326
Step 407: 333326 + 821 = 334147
Step 408: 334147 + 821 = 334968
Step 409: 334968 + 821 = 335789
Step 410: 335789 + 821 = 336610
Step 411: 336610 + 821 = 337431
Step 412: 337431 + 821 = 338252
Step 413: 338252 + 821 = 339073
Step 414: 339073 + 821 = 339894
Step 415: 339894 + 821 = 340715
Step 416: 340715 + 821 = 341536
Step 417: 341536 + 821 = 342357
Step 418: 342357 + 821 = 343178
Step 419: 343178 + 821 = 343999
Step 420: 343999 + 821 = 344820
Step 421: 344820 + 821 = 345641
Step 422: 345641 + 821 = 346462
Step 423: 346462 + 821 = 347283
Step 424: 347283 + 821 = 348104
Step 425: 348104 + 821 = 348925
Step 426: 348925 + 821 = 349746
Step 427: 349746 + 821 = 350567
Step 428: 350567 + 821 = 351388
Step 429: 351388 + 821 = 352209

So, 821*429 = 352209