Without delay, let's solve this. We've got 904 and we will be multiplying it by 454, that is, adding 904 to itself 454 times.
Step 1: 0 + 904 = 904
Step 2: 904 + 904 = 1808
Step 3: 1808 + 904 = 2712
Step 4: 2712 + 904 = 3616
Step 5: 3616 + 904 = 4520
Step 6: 4520 + 904 = 5424
Step 7: 5424 + 904 = 6328
Step 8: 6328 + 904 = 7232
Step 9: 7232 + 904 = 8136
Step 10: 8136 + 904 = 9040
Step 11: 9040 + 904 = 9944
Step 12: 9944 + 904 = 10848
Step 13: 10848 + 904 = 11752
Step 14: 11752 + 904 = 12656
Step 15: 12656 + 904 = 13560
Step 16: 13560 + 904 = 14464
Step 17: 14464 + 904 = 15368
Step 18: 15368 + 904 = 16272
Step 19: 16272 + 904 = 17176
Step 20: 17176 + 904 = 18080
Step 21: 18080 + 904 = 18984
Step 22: 18984 + 904 = 19888
Step 23: 19888 + 904 = 20792
Step 24: 20792 + 904 = 21696
Step 25: 21696 + 904 = 22600
Step 26: 22600 + 904 = 23504
Step 27: 23504 + 904 = 24408
Step 28: 24408 + 904 = 25312
Step 29: 25312 + 904 = 26216
Step 30: 26216 + 904 = 27120
Step 31: 27120 + 904 = 28024
Step 32: 28024 + 904 = 28928
Step 33: 28928 + 904 = 29832
Step 34: 29832 + 904 = 30736
Step 35: 30736 + 904 = 31640
Step 36: 31640 + 904 = 32544
Step 37: 32544 + 904 = 33448
Step 38: 33448 + 904 = 34352
Step 39: 34352 + 904 = 35256
Step 40: 35256 + 904 = 36160
Step 41: 36160 + 904 = 37064
Step 42: 37064 + 904 = 37968
Step 43: 37968 + 904 = 38872
Step 44: 38872 + 904 = 39776
Step 45: 39776 + 904 = 40680
Step 46: 40680 + 904 = 41584
Step 47: 41584 + 904 = 42488
Step 48: 42488 + 904 = 43392
Step 49: 43392 + 904 = 44296
Step 50: 44296 + 904 = 45200
Step 51: 45200 + 904 = 46104
Step 52: 46104 + 904 = 47008
Step 53: 47008 + 904 = 47912
Step 54: 47912 + 904 = 48816
Step 55: 48816 + 904 = 49720
Step 56: 49720 + 904 = 50624
Step 57: 50624 + 904 = 51528
Step 58: 51528 + 904 = 52432
Step 59: 52432 + 904 = 53336
Step 60: 53336 + 904 = 54240
Step 61: 54240 + 904 = 55144
Step 62: 55144 + 904 = 56048
Step 63: 56048 + 904 = 56952
Step 64: 56952 + 904 = 57856
Step 65: 57856 + 904 = 58760
Step 66: 58760 + 904 = 59664
Step 67: 59664 + 904 = 60568
Step 68: 60568 + 904 = 61472
Step 69: 61472 + 904 = 62376
Step 70: 62376 + 904 = 63280
Step 71: 63280 + 904 = 64184
Step 72: 64184 + 904 = 65088
Step 73: 65088 + 904 = 65992
Step 74: 65992 + 904 = 66896
Step 75: 66896 + 904 = 67800
Step 76: 67800 + 904 = 68704
Step 77: 68704 + 904 = 69608
Step 78: 69608 + 904 = 70512
Step 79: 70512 + 904 = 71416
Step 80: 71416 + 904 = 72320
Step 81: 72320 + 904 = 73224
Step 82: 73224 + 904 = 74128
Step 83: 74128 + 904 = 75032
Step 84: 75032 + 904 = 75936
Step 85: 75936 + 904 = 76840
Step 86: 76840 + 904 = 77744
Step 87: 77744 + 904 = 78648
Step 88: 78648 + 904 = 79552
Step 89: 79552 + 904 = 80456
Step 90: 80456 + 904 = 81360
Step 91: 81360 + 904 = 82264
Step 92: 82264 + 904 = 83168
Step 93: 83168 + 904 = 84072
Step 94: 84072 + 904 = 84976
Step 95: 84976 + 904 = 85880
Step 96: 85880 + 904 = 86784
Step 97: 86784 + 904 = 87688
Step 98: 87688 + 904 = 88592
Step 99: 88592 + 904 = 89496
Step 100: 89496 + 904 = 90400
Step 101: 90400 + 904 = 91304
Step 102: 91304 + 904 = 92208
Step 103: 92208 + 904 = 93112
Step 104: 93112 + 904 = 94016
Step 105: 94016 + 904 = 94920
Step 106: 94920 + 904 = 95824
Step 107: 95824 + 904 = 96728
Step 108: 96728 + 904 = 97632
Step 109: 97632 + 904 = 98536
Step 110: 98536 + 904 = 99440
Step 111: 99440 + 904 = 100344
Step 112: 100344 + 904 = 101248
Step 113: 101248 + 904 = 102152
Step 114: 102152 + 904 = 103056
Step 115: 103056 + 904 = 103960
Step 116: 103960 + 904 = 104864
Step 117: 104864 + 904 = 105768
Step 118: 105768 + 904 = 106672
Step 119: 106672 + 904 = 107576
Step 120: 107576 + 904 = 108480
Step 121: 108480 + 904 = 109384
Step 122: 109384 + 904 = 110288
Step 123: 110288 + 904 = 111192
Step 124: 111192 + 904 = 112096
Step 125: 112096 + 904 = 113000
Step 126: 113000 + 904 = 113904
Step 127: 113904 + 904 = 114808
Step 128: 114808 + 904 = 115712
Step 129: 115712 + 904 = 116616
Step 130: 116616 + 904 = 117520
Step 131: 117520 + 904 = 118424
Step 132: 118424 + 904 = 119328
Step 133: 119328 + 904 = 120232
Step 134: 120232 + 904 = 121136
Step 135: 121136 + 904 = 122040
Step 136: 122040 + 904 = 122944
Step 137: 122944 + 904 = 123848
Step 138: 123848 + 904 = 124752
Step 139: 124752 + 904 = 125656
Step 140: 125656 + 904 = 126560
Step 141: 126560 + 904 = 127464
Step 142: 127464 + 904 = 128368
Step 143: 128368 + 904 = 129272
Step 144: 129272 + 904 = 130176
Step 145: 130176 + 904 = 131080
Step 146: 131080 + 904 = 131984
Step 147: 131984 + 904 = 132888
Step 148: 132888 + 904 = 133792
Step 149: 133792 + 904 = 134696
Step 150: 134696 + 904 = 135600
Step 151: 135600 + 904 = 136504
Step 152: 136504 + 904 = 137408
Step 153: 137408 + 904 = 138312
Step 154: 138312 + 904 = 139216
Step 155: 139216 + 904 = 140120
Step 156: 140120 + 904 = 141024
Step 157: 141024 + 904 = 141928
Step 158: 141928 + 904 = 142832
Step 159: 142832 + 904 = 143736
Step 160: 143736 + 904 = 144640
Step 161: 144640 + 904 = 145544
Step 162: 145544 + 904 = 146448
Step 163: 146448 + 904 = 147352
Step 164: 147352 + 904 = 148256
Step 165: 148256 + 904 = 149160
Step 166: 149160 + 904 = 150064
Step 167: 150064 + 904 = 150968
Step 168: 150968 + 904 = 151872
Step 169: 151872 + 904 = 152776
Step 170: 152776 + 904 = 153680
Step 171: 153680 + 904 = 154584
Step 172: 154584 + 904 = 155488
Step 173: 155488 + 904 = 156392
Step 174: 156392 + 904 = 157296
Step 175: 157296 + 904 = 158200
Step 176: 158200 + 904 = 159104
Step 177: 159104 + 904 = 160008
Step 178: 160008 + 904 = 160912
Step 179: 160912 + 904 = 161816
Step 180: 161816 + 904 = 162720
Step 181: 162720 + 904 = 163624
Step 182: 163624 + 904 = 164528
Step 183: 164528 + 904 = 165432
Step 184: 165432 + 904 = 166336
Step 185: 166336 + 904 = 167240
Step 186: 167240 + 904 = 168144
Step 187: 168144 + 904 = 169048
Step 188: 169048 + 904 = 169952
Step 189: 169952 + 904 = 170856
Step 190: 170856 + 904 = 171760
Step 191: 171760 + 904 = 172664
Step 192: 172664 + 904 = 173568
Step 193: 173568 + 904 = 174472
Step 194: 174472 + 904 = 175376
Step 195: 175376 + 904 = 176280
Step 196: 176280 + 904 = 177184
Step 197: 177184 + 904 = 178088
Step 198: 178088 + 904 = 178992
Step 199: 178992 + 904 = 179896
Step 200: 179896 + 904 = 180800
Step 201: 180800 + 904 = 181704
Step 202: 181704 + 904 = 182608
Step 203: 182608 + 904 = 183512
Step 204: 183512 + 904 = 184416
Step 205: 184416 + 904 = 185320
Step 206: 185320 + 904 = 186224
Step 207: 186224 + 904 = 187128
Step 208: 187128 + 904 = 188032
Step 209: 188032 + 904 = 188936
Step 210: 188936 + 904 = 189840
Step 211: 189840 + 904 = 190744
Step 212: 190744 + 904 = 191648
Step 213: 191648 + 904 = 192552
Step 214: 192552 + 904 = 193456
Step 215: 193456 + 904 = 194360
Step 216: 194360 + 904 = 195264
Step 217: 195264 + 904 = 196168
Step 218: 196168 + 904 = 197072
Step 219: 197072 + 904 = 197976
Step 220: 197976 + 904 = 198880
Step 221: 198880 + 904 = 199784
Step 222: 199784 + 904 = 200688
Step 223: 200688 + 904 = 201592
Step 224: 201592 + 904 = 202496
Step 225: 202496 + 904 = 203400
Step 226: 203400 + 904 = 204304
Step 227: 204304 + 904 = 205208
Step 228: 205208 + 904 = 206112
Step 229: 206112 + 904 = 207016
Step 230: 207016 + 904 = 207920
Step 231: 207920 + 904 = 208824
Step 232: 208824 + 904 = 209728
Step 233: 209728 + 904 = 210632
Step 234: 210632 + 904 = 211536
Step 235: 211536 + 904 = 212440
Step 236: 212440 + 904 = 213344
Step 237: 213344 + 904 = 214248
Step 238: 214248 + 904 = 215152
Step 239: 215152 + 904 = 216056
Step 240: 216056 + 904 = 216960
Step 241: 216960 + 904 = 217864
Step 242: 217864 + 904 = 218768
Step 243: 218768 + 904 = 219672
Step 244: 219672 + 904 = 220576
Step 245: 220576 + 904 = 221480
Step 246: 221480 + 904 = 222384
Step 247: 222384 + 904 = 223288
Step 248: 223288 + 904 = 224192
Step 249: 224192 + 904 = 225096
Step 250: 225096 + 904 = 226000
Step 251: 226000 + 904 = 226904
Step 252: 226904 + 904 = 227808
Step 253: 227808 + 904 = 228712
Step 254: 228712 + 904 = 229616
Step 255: 229616 + 904 = 230520
Step 256: 230520 + 904 = 231424
Step 257: 231424 + 904 = 232328
Step 258: 232328 + 904 = 233232
Step 259: 233232 + 904 = 234136
Step 260: 234136 + 904 = 235040
Step 261: 235040 + 904 = 235944
Step 262: 235944 + 904 = 236848
Step 263: 236848 + 904 = 237752
Step 264: 237752 + 904 = 238656
Step 265: 238656 + 904 = 239560
Step 266: 239560 + 904 = 240464
Step 267: 240464 + 904 = 241368
Step 268: 241368 + 904 = 242272
Step 269: 242272 + 904 = 243176
Step 270: 243176 + 904 = 244080
Step 271: 244080 + 904 = 244984
Step 272: 244984 + 904 = 245888
Step 273: 245888 + 904 = 246792
Step 274: 246792 + 904 = 247696
Step 275: 247696 + 904 = 248600
Step 276: 248600 + 904 = 249504
Step 277: 249504 + 904 = 250408
Step 278: 250408 + 904 = 251312
Step 279: 251312 + 904 = 252216
Step 280: 252216 + 904 = 253120
Step 281: 253120 + 904 = 254024
Step 282: 254024 + 904 = 254928
Step 283: 254928 + 904 = 255832
Step 284: 255832 + 904 = 256736
Step 285: 256736 + 904 = 257640
Step 286: 257640 + 904 = 258544
Step 287: 258544 + 904 = 259448
Step 288: 259448 + 904 = 260352
Step 289: 260352 + 904 = 261256
Step 290: 261256 + 904 = 262160
Step 291: 262160 + 904 = 263064
Step 292: 263064 + 904 = 263968
Step 293: 263968 + 904 = 264872
Step 294: 264872 + 904 = 265776
Step 295: 265776 + 904 = 266680
Step 296: 266680 + 904 = 267584
Step 297: 267584 + 904 = 268488
Step 298: 268488 + 904 = 269392
Step 299: 269392 + 904 = 270296
Step 300: 270296 + 904 = 271200
Step 301: 271200 + 904 = 272104
Step 302: 272104 + 904 = 273008
Step 303: 273008 + 904 = 273912
Step 304: 273912 + 904 = 274816
Step 305: 274816 + 904 = 275720
Step 306: 275720 + 904 = 276624
Step 307: 276624 + 904 = 277528
Step 308: 277528 + 904 = 278432
Step 309: 278432 + 904 = 279336
Step 310: 279336 + 904 = 280240
Step 311: 280240 + 904 = 281144
Step 312: 281144 + 904 = 282048
Step 313: 282048 + 904 = 282952
Step 314: 282952 + 904 = 283856
Step 315: 283856 + 904 = 284760
Step 316: 284760 + 904 = 285664
Step 317: 285664 + 904 = 286568
Step 318: 286568 + 904 = 287472
Step 319: 287472 + 904 = 288376
Step 320: 288376 + 904 = 289280
Step 321: 289280 + 904 = 290184
Step 322: 290184 + 904 = 291088
Step 323: 291088 + 904 = 291992
Step 324: 291992 + 904 = 292896
Step 325: 292896 + 904 = 293800
Step 326: 293800 + 904 = 294704
Step 327: 294704 + 904 = 295608
Step 328: 295608 + 904 = 296512
Step 329: 296512 + 904 = 297416
Step 330: 297416 + 904 = 298320
Step 331: 298320 + 904 = 299224
Step 332: 299224 + 904 = 300128
Step 333: 300128 + 904 = 301032
Step 334: 301032 + 904 = 301936
Step 335: 301936 + 904 = 302840
Step 336: 302840 + 904 = 303744
Step 337: 303744 + 904 = 304648
Step 338: 304648 + 904 = 305552
Step 339: 305552 + 904 = 306456
Step 340: 306456 + 904 = 307360
Step 341: 307360 + 904 = 308264
Step 342: 308264 + 904 = 309168
Step 343: 309168 + 904 = 310072
Step 344: 310072 + 904 = 310976
Step 345: 310976 + 904 = 311880
Step 346: 311880 + 904 = 312784
Step 347: 312784 + 904 = 313688
Step 348: 313688 + 904 = 314592
Step 349: 314592 + 904 = 315496
Step 350: 315496 + 904 = 316400
Step 351: 316400 + 904 = 317304
Step 352: 317304 + 904 = 318208
Step 353: 318208 + 904 = 319112
Step 354: 319112 + 904 = 320016
Step 355: 320016 + 904 = 320920
Step 356: 320920 + 904 = 321824
Step 357: 321824 + 904 = 322728
Step 358: 322728 + 904 = 323632
Step 359: 323632 + 904 = 324536
Step 360: 324536 + 904 = 325440
Step 361: 325440 + 904 = 326344
Step 362: 326344 + 904 = 327248
Step 363: 327248 + 904 = 328152
Step 364: 328152 + 904 = 329056
Step 365: 329056 + 904 = 329960
Step 366: 329960 + 904 = 330864
Step 367: 330864 + 904 = 331768
Step 368: 331768 + 904 = 332672
Step 369: 332672 + 904 = 333576
Step 370: 333576 + 904 = 334480
Step 371: 334480 + 904 = 335384
Step 372: 335384 + 904 = 336288
Step 373: 336288 + 904 = 337192
Step 374: 337192 + 904 = 338096
Step 375: 338096 + 904 = 339000
Step 376: 339000 + 904 = 339904
Step 377: 339904 + 904 = 340808
Step 378: 340808 + 904 = 341712
Step 379: 341712 + 904 = 342616
Step 380: 342616 + 904 = 343520
Step 381: 343520 + 904 = 344424
Step 382: 344424 + 904 = 345328
Step 383: 345328 + 904 = 346232
Step 384: 346232 + 904 = 347136
Step 385: 347136 + 904 = 348040
Step 386: 348040 + 904 = 348944
Step 387: 348944 + 904 = 349848
Step 388: 349848 + 904 = 350752
Step 389: 350752 + 904 = 351656
Step 390: 351656 + 904 = 352560
Step 391: 352560 + 904 = 353464
Step 392: 353464 + 904 = 354368
Step 393: 354368 + 904 = 355272
Step 394: 355272 + 904 = 356176
Step 395: 356176 + 904 = 357080
Step 396: 357080 + 904 = 357984
Step 397: 357984 + 904 = 358888
Step 398: 358888 + 904 = 359792
Step 399: 359792 + 904 = 360696
Step 400: 360696 + 904 = 361600
Step 401: 361600 + 904 = 362504
Step 402: 362504 + 904 = 363408
Step 403: 363408 + 904 = 364312
Step 404: 364312 + 904 = 365216
Step 405: 365216 + 904 = 366120
Step 406: 366120 + 904 = 367024
Step 407: 367024 + 904 = 367928
Step 408: 367928 + 904 = 368832
Step 409: 368832 + 904 = 369736
Step 410: 369736 + 904 = 370640
Step 411: 370640 + 904 = 371544
Step 412: 371544 + 904 = 372448
Step 413: 372448 + 904 = 373352
Step 414: 373352 + 904 = 374256
Step 415: 374256 + 904 = 375160
Step 416: 375160 + 904 = 376064
Step 417: 376064 + 904 = 376968
Step 418: 376968 + 904 = 377872
Step 419: 377872 + 904 = 378776
Step 420: 378776 + 904 = 379680
Step 421: 379680 + 904 = 380584
Step 422: 380584 + 904 = 381488
Step 423: 381488 + 904 = 382392
Step 424: 382392 + 904 = 383296
Step 425: 383296 + 904 = 384200
Step 426: 384200 + 904 = 385104
Step 427: 385104 + 904 = 386008
Step 428: 386008 + 904 = 386912
Step 429: 386912 + 904 = 387816
Step 430: 387816 + 904 = 388720
Step 431: 388720 + 904 = 389624
Step 432: 389624 + 904 = 390528
Step 433: 390528 + 904 = 391432
Step 434: 391432 + 904 = 392336
Step 435: 392336 + 904 = 393240
Step 436: 393240 + 904 = 394144
Step 437: 394144 + 904 = 395048
Step 438: 395048 + 904 = 395952
Step 439: 395952 + 904 = 396856
Step 440: 396856 + 904 = 397760
Step 441: 397760 + 904 = 398664
Step 442: 398664 + 904 = 399568
Step 443: 399568 + 904 = 400472
Step 444: 400472 + 904 = 401376
Step 445: 401376 + 904 = 402280
Step 446: 402280 + 904 = 403184
Step 447: 403184 + 904 = 404088
Step 448: 404088 + 904 = 404992
Step 449: 404992 + 904 = 405896
Step 450: 405896 + 904 = 406800
Step 451: 406800 + 904 = 407704
Step 452: 407704 + 904 = 408608
Step 453: 408608 + 904 = 409512
Step 454: 409512 + 904 = 410416

So, 904*454 = 410416