OK, let's work through this together. We're starting with 819 and we're going to multiply it by 454, which means we add 819 to itself 454 times.
Step 1: 0 + 819 = 819
Step 2: 819 + 819 = 1638
Step 3: 1638 + 819 = 2457
Step 4: 2457 + 819 = 3276
Step 5: 3276 + 819 = 4095
Step 6: 4095 + 819 = 4914
Step 7: 4914 + 819 = 5733
Step 8: 5733 + 819 = 6552
Step 9: 6552 + 819 = 7371
Step 10: 7371 + 819 = 8190
Step 11: 8190 + 819 = 9009
Step 12: 9009 + 819 = 9828
Step 13: 9828 + 819 = 10647
Step 14: 10647 + 819 = 11466
Step 15: 11466 + 819 = 12285
Step 16: 12285 + 819 = 13104
Step 17: 13104 + 819 = 13923
Step 18: 13923 + 819 = 14742
Step 19: 14742 + 819 = 15561
Step 20: 15561 + 819 = 16380
Step 21: 16380 + 819 = 17199
Step 22: 17199 + 819 = 18018
Step 23: 18018 + 819 = 18837
Step 24: 18837 + 819 = 19656
Step 25: 19656 + 819 = 20475
Step 26: 20475 + 819 = 21294
Step 27: 21294 + 819 = 22113
Step 28: 22113 + 819 = 22932
Step 29: 22932 + 819 = 23751
Step 30: 23751 + 819 = 24570
Step 31: 24570 + 819 = 25389
Step 32: 25389 + 819 = 26208
Step 33: 26208 + 819 = 27027
Step 34: 27027 + 819 = 27846
Step 35: 27846 + 819 = 28665
Step 36: 28665 + 819 = 29484
Step 37: 29484 + 819 = 30303
Step 38: 30303 + 819 = 31122
Step 39: 31122 + 819 = 31941
Step 40: 31941 + 819 = 32760
Step 41: 32760 + 819 = 33579
Step 42: 33579 + 819 = 34398
Step 43: 34398 + 819 = 35217
Step 44: 35217 + 819 = 36036
Step 45: 36036 + 819 = 36855
Step 46: 36855 + 819 = 37674
Step 47: 37674 + 819 = 38493
Step 48: 38493 + 819 = 39312
Step 49: 39312 + 819 = 40131
Step 50: 40131 + 819 = 40950
Step 51: 40950 + 819 = 41769
Step 52: 41769 + 819 = 42588
Step 53: 42588 + 819 = 43407
Step 54: 43407 + 819 = 44226
Step 55: 44226 + 819 = 45045
Step 56: 45045 + 819 = 45864
Step 57: 45864 + 819 = 46683
Step 58: 46683 + 819 = 47502
Step 59: 47502 + 819 = 48321
Step 60: 48321 + 819 = 49140
Step 61: 49140 + 819 = 49959
Step 62: 49959 + 819 = 50778
Step 63: 50778 + 819 = 51597
Step 64: 51597 + 819 = 52416
Step 65: 52416 + 819 = 53235
Step 66: 53235 + 819 = 54054
Step 67: 54054 + 819 = 54873
Step 68: 54873 + 819 = 55692
Step 69: 55692 + 819 = 56511
Step 70: 56511 + 819 = 57330
Step 71: 57330 + 819 = 58149
Step 72: 58149 + 819 = 58968
Step 73: 58968 + 819 = 59787
Step 74: 59787 + 819 = 60606
Step 75: 60606 + 819 = 61425
Step 76: 61425 + 819 = 62244
Step 77: 62244 + 819 = 63063
Step 78: 63063 + 819 = 63882
Step 79: 63882 + 819 = 64701
Step 80: 64701 + 819 = 65520
Step 81: 65520 + 819 = 66339
Step 82: 66339 + 819 = 67158
Step 83: 67158 + 819 = 67977
Step 84: 67977 + 819 = 68796
Step 85: 68796 + 819 = 69615
Step 86: 69615 + 819 = 70434
Step 87: 70434 + 819 = 71253
Step 88: 71253 + 819 = 72072
Step 89: 72072 + 819 = 72891
Step 90: 72891 + 819 = 73710
Step 91: 73710 + 819 = 74529
Step 92: 74529 + 819 = 75348
Step 93: 75348 + 819 = 76167
Step 94: 76167 + 819 = 76986
Step 95: 76986 + 819 = 77805
Step 96: 77805 + 819 = 78624
Step 97: 78624 + 819 = 79443
Step 98: 79443 + 819 = 80262
Step 99: 80262 + 819 = 81081
Step 100: 81081 + 819 = 81900
Step 101: 81900 + 819 = 82719
Step 102: 82719 + 819 = 83538
Step 103: 83538 + 819 = 84357
Step 104: 84357 + 819 = 85176
Step 105: 85176 + 819 = 85995
Step 106: 85995 + 819 = 86814
Step 107: 86814 + 819 = 87633
Step 108: 87633 + 819 = 88452
Step 109: 88452 + 819 = 89271
Step 110: 89271 + 819 = 90090
Step 111: 90090 + 819 = 90909
Step 112: 90909 + 819 = 91728
Step 113: 91728 + 819 = 92547
Step 114: 92547 + 819 = 93366
Step 115: 93366 + 819 = 94185
Step 116: 94185 + 819 = 95004
Step 117: 95004 + 819 = 95823
Step 118: 95823 + 819 = 96642
Step 119: 96642 + 819 = 97461
Step 120: 97461 + 819 = 98280
Step 121: 98280 + 819 = 99099
Step 122: 99099 + 819 = 99918
Step 123: 99918 + 819 = 100737
Step 124: 100737 + 819 = 101556
Step 125: 101556 + 819 = 102375
Step 126: 102375 + 819 = 103194
Step 127: 103194 + 819 = 104013
Step 128: 104013 + 819 = 104832
Step 129: 104832 + 819 = 105651
Step 130: 105651 + 819 = 106470
Step 131: 106470 + 819 = 107289
Step 132: 107289 + 819 = 108108
Step 133: 108108 + 819 = 108927
Step 134: 108927 + 819 = 109746
Step 135: 109746 + 819 = 110565
Step 136: 110565 + 819 = 111384
Step 137: 111384 + 819 = 112203
Step 138: 112203 + 819 = 113022
Step 139: 113022 + 819 = 113841
Step 140: 113841 + 819 = 114660
Step 141: 114660 + 819 = 115479
Step 142: 115479 + 819 = 116298
Step 143: 116298 + 819 = 117117
Step 144: 117117 + 819 = 117936
Step 145: 117936 + 819 = 118755
Step 146: 118755 + 819 = 119574
Step 147: 119574 + 819 = 120393
Step 148: 120393 + 819 = 121212
Step 149: 121212 + 819 = 122031
Step 150: 122031 + 819 = 122850
Step 151: 122850 + 819 = 123669
Step 152: 123669 + 819 = 124488
Step 153: 124488 + 819 = 125307
Step 154: 125307 + 819 = 126126
Step 155: 126126 + 819 = 126945
Step 156: 126945 + 819 = 127764
Step 157: 127764 + 819 = 128583
Step 158: 128583 + 819 = 129402
Step 159: 129402 + 819 = 130221
Step 160: 130221 + 819 = 131040
Step 161: 131040 + 819 = 131859
Step 162: 131859 + 819 = 132678
Step 163: 132678 + 819 = 133497
Step 164: 133497 + 819 = 134316
Step 165: 134316 + 819 = 135135
Step 166: 135135 + 819 = 135954
Step 167: 135954 + 819 = 136773
Step 168: 136773 + 819 = 137592
Step 169: 137592 + 819 = 138411
Step 170: 138411 + 819 = 139230
Step 171: 139230 + 819 = 140049
Step 172: 140049 + 819 = 140868
Step 173: 140868 + 819 = 141687
Step 174: 141687 + 819 = 142506
Step 175: 142506 + 819 = 143325
Step 176: 143325 + 819 = 144144
Step 177: 144144 + 819 = 144963
Step 178: 144963 + 819 = 145782
Step 179: 145782 + 819 = 146601
Step 180: 146601 + 819 = 147420
Step 181: 147420 + 819 = 148239
Step 182: 148239 + 819 = 149058
Step 183: 149058 + 819 = 149877
Step 184: 149877 + 819 = 150696
Step 185: 150696 + 819 = 151515
Step 186: 151515 + 819 = 152334
Step 187: 152334 + 819 = 153153
Step 188: 153153 + 819 = 153972
Step 189: 153972 + 819 = 154791
Step 190: 154791 + 819 = 155610
Step 191: 155610 + 819 = 156429
Step 192: 156429 + 819 = 157248
Step 193: 157248 + 819 = 158067
Step 194: 158067 + 819 = 158886
Step 195: 158886 + 819 = 159705
Step 196: 159705 + 819 = 160524
Step 197: 160524 + 819 = 161343
Step 198: 161343 + 819 = 162162
Step 199: 162162 + 819 = 162981
Step 200: 162981 + 819 = 163800
Step 201: 163800 + 819 = 164619
Step 202: 164619 + 819 = 165438
Step 203: 165438 + 819 = 166257
Step 204: 166257 + 819 = 167076
Step 205: 167076 + 819 = 167895
Step 206: 167895 + 819 = 168714
Step 207: 168714 + 819 = 169533
Step 208: 169533 + 819 = 170352
Step 209: 170352 + 819 = 171171
Step 210: 171171 + 819 = 171990
Step 211: 171990 + 819 = 172809
Step 212: 172809 + 819 = 173628
Step 213: 173628 + 819 = 174447
Step 214: 174447 + 819 = 175266
Step 215: 175266 + 819 = 176085
Step 216: 176085 + 819 = 176904
Step 217: 176904 + 819 = 177723
Step 218: 177723 + 819 = 178542
Step 219: 178542 + 819 = 179361
Step 220: 179361 + 819 = 180180
Step 221: 180180 + 819 = 180999
Step 222: 180999 + 819 = 181818
Step 223: 181818 + 819 = 182637
Step 224: 182637 + 819 = 183456
Step 225: 183456 + 819 = 184275
Step 226: 184275 + 819 = 185094
Step 227: 185094 + 819 = 185913
Step 228: 185913 + 819 = 186732
Step 229: 186732 + 819 = 187551
Step 230: 187551 + 819 = 188370
Step 231: 188370 + 819 = 189189
Step 232: 189189 + 819 = 190008
Step 233: 190008 + 819 = 190827
Step 234: 190827 + 819 = 191646
Step 235: 191646 + 819 = 192465
Step 236: 192465 + 819 = 193284
Step 237: 193284 + 819 = 194103
Step 238: 194103 + 819 = 194922
Step 239: 194922 + 819 = 195741
Step 240: 195741 + 819 = 196560
Step 241: 196560 + 819 = 197379
Step 242: 197379 + 819 = 198198
Step 243: 198198 + 819 = 199017
Step 244: 199017 + 819 = 199836
Step 245: 199836 + 819 = 200655
Step 246: 200655 + 819 = 201474
Step 247: 201474 + 819 = 202293
Step 248: 202293 + 819 = 203112
Step 249: 203112 + 819 = 203931
Step 250: 203931 + 819 = 204750
Step 251: 204750 + 819 = 205569
Step 252: 205569 + 819 = 206388
Step 253: 206388 + 819 = 207207
Step 254: 207207 + 819 = 208026
Step 255: 208026 + 819 = 208845
Step 256: 208845 + 819 = 209664
Step 257: 209664 + 819 = 210483
Step 258: 210483 + 819 = 211302
Step 259: 211302 + 819 = 212121
Step 260: 212121 + 819 = 212940
Step 261: 212940 + 819 = 213759
Step 262: 213759 + 819 = 214578
Step 263: 214578 + 819 = 215397
Step 264: 215397 + 819 = 216216
Step 265: 216216 + 819 = 217035
Step 266: 217035 + 819 = 217854
Step 267: 217854 + 819 = 218673
Step 268: 218673 + 819 = 219492
Step 269: 219492 + 819 = 220311
Step 270: 220311 + 819 = 221130
Step 271: 221130 + 819 = 221949
Step 272: 221949 + 819 = 222768
Step 273: 222768 + 819 = 223587
Step 274: 223587 + 819 = 224406
Step 275: 224406 + 819 = 225225
Step 276: 225225 + 819 = 226044
Step 277: 226044 + 819 = 226863
Step 278: 226863 + 819 = 227682
Step 279: 227682 + 819 = 228501
Step 280: 228501 + 819 = 229320
Step 281: 229320 + 819 = 230139
Step 282: 230139 + 819 = 230958
Step 283: 230958 + 819 = 231777
Step 284: 231777 + 819 = 232596
Step 285: 232596 + 819 = 233415
Step 286: 233415 + 819 = 234234
Step 287: 234234 + 819 = 235053
Step 288: 235053 + 819 = 235872
Step 289: 235872 + 819 = 236691
Step 290: 236691 + 819 = 237510
Step 291: 237510 + 819 = 238329
Step 292: 238329 + 819 = 239148
Step 293: 239148 + 819 = 239967
Step 294: 239967 + 819 = 240786
Step 295: 240786 + 819 = 241605
Step 296: 241605 + 819 = 242424
Step 297: 242424 + 819 = 243243
Step 298: 243243 + 819 = 244062
Step 299: 244062 + 819 = 244881
Step 300: 244881 + 819 = 245700
Step 301: 245700 + 819 = 246519
Step 302: 246519 + 819 = 247338
Step 303: 247338 + 819 = 248157
Step 304: 248157 + 819 = 248976
Step 305: 248976 + 819 = 249795
Step 306: 249795 + 819 = 250614
Step 307: 250614 + 819 = 251433
Step 308: 251433 + 819 = 252252
Step 309: 252252 + 819 = 253071
Step 310: 253071 + 819 = 253890
Step 311: 253890 + 819 = 254709
Step 312: 254709 + 819 = 255528
Step 313: 255528 + 819 = 256347
Step 314: 256347 + 819 = 257166
Step 315: 257166 + 819 = 257985
Step 316: 257985 + 819 = 258804
Step 317: 258804 + 819 = 259623
Step 318: 259623 + 819 = 260442
Step 319: 260442 + 819 = 261261
Step 320: 261261 + 819 = 262080
Step 321: 262080 + 819 = 262899
Step 322: 262899 + 819 = 263718
Step 323: 263718 + 819 = 264537
Step 324: 264537 + 819 = 265356
Step 325: 265356 + 819 = 266175
Step 326: 266175 + 819 = 266994
Step 327: 266994 + 819 = 267813
Step 328: 267813 + 819 = 268632
Step 329: 268632 + 819 = 269451
Step 330: 269451 + 819 = 270270
Step 331: 270270 + 819 = 271089
Step 332: 271089 + 819 = 271908
Step 333: 271908 + 819 = 272727
Step 334: 272727 + 819 = 273546
Step 335: 273546 + 819 = 274365
Step 336: 274365 + 819 = 275184
Step 337: 275184 + 819 = 276003
Step 338: 276003 + 819 = 276822
Step 339: 276822 + 819 = 277641
Step 340: 277641 + 819 = 278460
Step 341: 278460 + 819 = 279279
Step 342: 279279 + 819 = 280098
Step 343: 280098 + 819 = 280917
Step 344: 280917 + 819 = 281736
Step 345: 281736 + 819 = 282555
Step 346: 282555 + 819 = 283374
Step 347: 283374 + 819 = 284193
Step 348: 284193 + 819 = 285012
Step 349: 285012 + 819 = 285831
Step 350: 285831 + 819 = 286650
Step 351: 286650 + 819 = 287469
Step 352: 287469 + 819 = 288288
Step 353: 288288 + 819 = 289107
Step 354: 289107 + 819 = 289926
Step 355: 289926 + 819 = 290745
Step 356: 290745 + 819 = 291564
Step 357: 291564 + 819 = 292383
Step 358: 292383 + 819 = 293202
Step 359: 293202 + 819 = 294021
Step 360: 294021 + 819 = 294840
Step 361: 294840 + 819 = 295659
Step 362: 295659 + 819 = 296478
Step 363: 296478 + 819 = 297297
Step 364: 297297 + 819 = 298116
Step 365: 298116 + 819 = 298935
Step 366: 298935 + 819 = 299754
Step 367: 299754 + 819 = 300573
Step 368: 300573 + 819 = 301392
Step 369: 301392 + 819 = 302211
Step 370: 302211 + 819 = 303030
Step 371: 303030 + 819 = 303849
Step 372: 303849 + 819 = 304668
Step 373: 304668 + 819 = 305487
Step 374: 305487 + 819 = 306306
Step 375: 306306 + 819 = 307125
Step 376: 307125 + 819 = 307944
Step 377: 307944 + 819 = 308763
Step 378: 308763 + 819 = 309582
Step 379: 309582 + 819 = 310401
Step 380: 310401 + 819 = 311220
Step 381: 311220 + 819 = 312039
Step 382: 312039 + 819 = 312858
Step 383: 312858 + 819 = 313677
Step 384: 313677 + 819 = 314496
Step 385: 314496 + 819 = 315315
Step 386: 315315 + 819 = 316134
Step 387: 316134 + 819 = 316953
Step 388: 316953 + 819 = 317772
Step 389: 317772 + 819 = 318591
Step 390: 318591 + 819 = 319410
Step 391: 319410 + 819 = 320229
Step 392: 320229 + 819 = 321048
Step 393: 321048 + 819 = 321867
Step 394: 321867 + 819 = 322686
Step 395: 322686 + 819 = 323505
Step 396: 323505 + 819 = 324324
Step 397: 324324 + 819 = 325143
Step 398: 325143 + 819 = 325962
Step 399: 325962 + 819 = 326781
Step 400: 326781 + 819 = 327600
Step 401: 327600 + 819 = 328419
Step 402: 328419 + 819 = 329238
Step 403: 329238 + 819 = 330057
Step 404: 330057 + 819 = 330876
Step 405: 330876 + 819 = 331695
Step 406: 331695 + 819 = 332514
Step 407: 332514 + 819 = 333333
Step 408: 333333 + 819 = 334152
Step 409: 334152 + 819 = 334971
Step 410: 334971 + 819 = 335790
Step 411: 335790 + 819 = 336609
Step 412: 336609 + 819 = 337428
Step 413: 337428 + 819 = 338247
Step 414: 338247 + 819 = 339066
Step 415: 339066 + 819 = 339885
Step 416: 339885 + 819 = 340704
Step 417: 340704 + 819 = 341523
Step 418: 341523 + 819 = 342342
Step 419: 342342 + 819 = 343161
Step 420: 343161 + 819 = 343980
Step 421: 343980 + 819 = 344799
Step 422: 344799 + 819 = 345618
Step 423: 345618 + 819 = 346437
Step 424: 346437 + 819 = 347256
Step 425: 347256 + 819 = 348075
Step 426: 348075 + 819 = 348894
Step 427: 348894 + 819 = 349713
Step 428: 349713 + 819 = 350532
Step 429: 350532 + 819 = 351351
Step 430: 351351 + 819 = 352170
Step 431: 352170 + 819 = 352989
Step 432: 352989 + 819 = 353808
Step 433: 353808 + 819 = 354627
Step 434: 354627 + 819 = 355446
Step 435: 355446 + 819 = 356265
Step 436: 356265 + 819 = 357084
Step 437: 357084 + 819 = 357903
Step 438: 357903 + 819 = 358722
Step 439: 358722 + 819 = 359541
Step 440: 359541 + 819 = 360360
Step 441: 360360 + 819 = 361179
Step 442: 361179 + 819 = 361998
Step 443: 361998 + 819 = 362817
Step 444: 362817 + 819 = 363636
Step 445: 363636 + 819 = 364455
Step 446: 364455 + 819 = 365274
Step 447: 365274 + 819 = 366093
Step 448: 366093 + 819 = 366912
Step 449: 366912 + 819 = 367731
Step 450: 367731 + 819 = 368550
Step 451: 368550 + 819 = 369369
Step 452: 369369 + 819 = 370188
Step 453: 370188 + 819 = 371007
Step 454: 371007 + 819 = 371826

So, 819*454 = 371826