Alright, let's solve this math problem step by step. First, we have the number 903. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 423. So, we're going to take the number 903 and add it to itself 423 times.
Step 1: 0 + 903 = 903
Step 2: 903 + 903 = 1806
Step 3: 1806 + 903 = 2709
Step 4: 2709 + 903 = 3612
Step 5: 3612 + 903 = 4515
Step 6: 4515 + 903 = 5418
Step 7: 5418 + 903 = 6321
Step 8: 6321 + 903 = 7224
Step 9: 7224 + 903 = 8127
Step 10: 8127 + 903 = 9030
Step 11: 9030 + 903 = 9933
Step 12: 9933 + 903 = 10836
Step 13: 10836 + 903 = 11739
Step 14: 11739 + 903 = 12642
Step 15: 12642 + 903 = 13545
Step 16: 13545 + 903 = 14448
Step 17: 14448 + 903 = 15351
Step 18: 15351 + 903 = 16254
Step 19: 16254 + 903 = 17157
Step 20: 17157 + 903 = 18060
Step 21: 18060 + 903 = 18963
Step 22: 18963 + 903 = 19866
Step 23: 19866 + 903 = 20769
Step 24: 20769 + 903 = 21672
Step 25: 21672 + 903 = 22575
Step 26: 22575 + 903 = 23478
Step 27: 23478 + 903 = 24381
Step 28: 24381 + 903 = 25284
Step 29: 25284 + 903 = 26187
Step 30: 26187 + 903 = 27090
Step 31: 27090 + 903 = 27993
Step 32: 27993 + 903 = 28896
Step 33: 28896 + 903 = 29799
Step 34: 29799 + 903 = 30702
Step 35: 30702 + 903 = 31605
Step 36: 31605 + 903 = 32508
Step 37: 32508 + 903 = 33411
Step 38: 33411 + 903 = 34314
Step 39: 34314 + 903 = 35217
Step 40: 35217 + 903 = 36120
Step 41: 36120 + 903 = 37023
Step 42: 37023 + 903 = 37926
Step 43: 37926 + 903 = 38829
Step 44: 38829 + 903 = 39732
Step 45: 39732 + 903 = 40635
Step 46: 40635 + 903 = 41538
Step 47: 41538 + 903 = 42441
Step 48: 42441 + 903 = 43344
Step 49: 43344 + 903 = 44247
Step 50: 44247 + 903 = 45150
Step 51: 45150 + 903 = 46053
Step 52: 46053 + 903 = 46956
Step 53: 46956 + 903 = 47859
Step 54: 47859 + 903 = 48762
Step 55: 48762 + 903 = 49665
Step 56: 49665 + 903 = 50568
Step 57: 50568 + 903 = 51471
Step 58: 51471 + 903 = 52374
Step 59: 52374 + 903 = 53277
Step 60: 53277 + 903 = 54180
Step 61: 54180 + 903 = 55083
Step 62: 55083 + 903 = 55986
Step 63: 55986 + 903 = 56889
Step 64: 56889 + 903 = 57792
Step 65: 57792 + 903 = 58695
Step 66: 58695 + 903 = 59598
Step 67: 59598 + 903 = 60501
Step 68: 60501 + 903 = 61404
Step 69: 61404 + 903 = 62307
Step 70: 62307 + 903 = 63210
Step 71: 63210 + 903 = 64113
Step 72: 64113 + 903 = 65016
Step 73: 65016 + 903 = 65919
Step 74: 65919 + 903 = 66822
Step 75: 66822 + 903 = 67725
Step 76: 67725 + 903 = 68628
Step 77: 68628 + 903 = 69531
Step 78: 69531 + 903 = 70434
Step 79: 70434 + 903 = 71337
Step 80: 71337 + 903 = 72240
Step 81: 72240 + 903 = 73143
Step 82: 73143 + 903 = 74046
Step 83: 74046 + 903 = 74949
Step 84: 74949 + 903 = 75852
Step 85: 75852 + 903 = 76755
Step 86: 76755 + 903 = 77658
Step 87: 77658 + 903 = 78561
Step 88: 78561 + 903 = 79464
Step 89: 79464 + 903 = 80367
Step 90: 80367 + 903 = 81270
Step 91: 81270 + 903 = 82173
Step 92: 82173 + 903 = 83076
Step 93: 83076 + 903 = 83979
Step 94: 83979 + 903 = 84882
Step 95: 84882 + 903 = 85785
Step 96: 85785 + 903 = 86688
Step 97: 86688 + 903 = 87591
Step 98: 87591 + 903 = 88494
Step 99: 88494 + 903 = 89397
Step 100: 89397 + 903 = 90300
Step 101: 90300 + 903 = 91203
Step 102: 91203 + 903 = 92106
Step 103: 92106 + 903 = 93009
Step 104: 93009 + 903 = 93912
Step 105: 93912 + 903 = 94815
Step 106: 94815 + 903 = 95718
Step 107: 95718 + 903 = 96621
Step 108: 96621 + 903 = 97524
Step 109: 97524 + 903 = 98427
Step 110: 98427 + 903 = 99330
Step 111: 99330 + 903 = 100233
Step 112: 100233 + 903 = 101136
Step 113: 101136 + 903 = 102039
Step 114: 102039 + 903 = 102942
Step 115: 102942 + 903 = 103845
Step 116: 103845 + 903 = 104748
Step 117: 104748 + 903 = 105651
Step 118: 105651 + 903 = 106554
Step 119: 106554 + 903 = 107457
Step 120: 107457 + 903 = 108360
Step 121: 108360 + 903 = 109263
Step 122: 109263 + 903 = 110166
Step 123: 110166 + 903 = 111069
Step 124: 111069 + 903 = 111972
Step 125: 111972 + 903 = 112875
Step 126: 112875 + 903 = 113778
Step 127: 113778 + 903 = 114681
Step 128: 114681 + 903 = 115584
Step 129: 115584 + 903 = 116487
Step 130: 116487 + 903 = 117390
Step 131: 117390 + 903 = 118293
Step 132: 118293 + 903 = 119196
Step 133: 119196 + 903 = 120099
Step 134: 120099 + 903 = 121002
Step 135: 121002 + 903 = 121905
Step 136: 121905 + 903 = 122808
Step 137: 122808 + 903 = 123711
Step 138: 123711 + 903 = 124614
Step 139: 124614 + 903 = 125517
Step 140: 125517 + 903 = 126420
Step 141: 126420 + 903 = 127323
Step 142: 127323 + 903 = 128226
Step 143: 128226 + 903 = 129129
Step 144: 129129 + 903 = 130032
Step 145: 130032 + 903 = 130935
Step 146: 130935 + 903 = 131838
Step 147: 131838 + 903 = 132741
Step 148: 132741 + 903 = 133644
Step 149: 133644 + 903 = 134547
Step 150: 134547 + 903 = 135450
Step 151: 135450 + 903 = 136353
Step 152: 136353 + 903 = 137256
Step 153: 137256 + 903 = 138159
Step 154: 138159 + 903 = 139062
Step 155: 139062 + 903 = 139965
Step 156: 139965 + 903 = 140868
Step 157: 140868 + 903 = 141771
Step 158: 141771 + 903 = 142674
Step 159: 142674 + 903 = 143577
Step 160: 143577 + 903 = 144480
Step 161: 144480 + 903 = 145383
Step 162: 145383 + 903 = 146286
Step 163: 146286 + 903 = 147189
Step 164: 147189 + 903 = 148092
Step 165: 148092 + 903 = 148995
Step 166: 148995 + 903 = 149898
Step 167: 149898 + 903 = 150801
Step 168: 150801 + 903 = 151704
Step 169: 151704 + 903 = 152607
Step 170: 152607 + 903 = 153510
Step 171: 153510 + 903 = 154413
Step 172: 154413 + 903 = 155316
Step 173: 155316 + 903 = 156219
Step 174: 156219 + 903 = 157122
Step 175: 157122 + 903 = 158025
Step 176: 158025 + 903 = 158928
Step 177: 158928 + 903 = 159831
Step 178: 159831 + 903 = 160734
Step 179: 160734 + 903 = 161637
Step 180: 161637 + 903 = 162540
Step 181: 162540 + 903 = 163443
Step 182: 163443 + 903 = 164346
Step 183: 164346 + 903 = 165249
Step 184: 165249 + 903 = 166152
Step 185: 166152 + 903 = 167055
Step 186: 167055 + 903 = 167958
Step 187: 167958 + 903 = 168861
Step 188: 168861 + 903 = 169764
Step 189: 169764 + 903 = 170667
Step 190: 170667 + 903 = 171570
Step 191: 171570 + 903 = 172473
Step 192: 172473 + 903 = 173376
Step 193: 173376 + 903 = 174279
Step 194: 174279 + 903 = 175182
Step 195: 175182 + 903 = 176085
Step 196: 176085 + 903 = 176988
Step 197: 176988 + 903 = 177891
Step 198: 177891 + 903 = 178794
Step 199: 178794 + 903 = 179697
Step 200: 179697 + 903 = 180600
Step 201: 180600 + 903 = 181503
Step 202: 181503 + 903 = 182406
Step 203: 182406 + 903 = 183309
Step 204: 183309 + 903 = 184212
Step 205: 184212 + 903 = 185115
Step 206: 185115 + 903 = 186018
Step 207: 186018 + 903 = 186921
Step 208: 186921 + 903 = 187824
Step 209: 187824 + 903 = 188727
Step 210: 188727 + 903 = 189630
Step 211: 189630 + 903 = 190533
Step 212: 190533 + 903 = 191436
Step 213: 191436 + 903 = 192339
Step 214: 192339 + 903 = 193242
Step 215: 193242 + 903 = 194145
Step 216: 194145 + 903 = 195048
Step 217: 195048 + 903 = 195951
Step 218: 195951 + 903 = 196854
Step 219: 196854 + 903 = 197757
Step 220: 197757 + 903 = 198660
Step 221: 198660 + 903 = 199563
Step 222: 199563 + 903 = 200466
Step 223: 200466 + 903 = 201369
Step 224: 201369 + 903 = 202272
Step 225: 202272 + 903 = 203175
Step 226: 203175 + 903 = 204078
Step 227: 204078 + 903 = 204981
Step 228: 204981 + 903 = 205884
Step 229: 205884 + 903 = 206787
Step 230: 206787 + 903 = 207690
Step 231: 207690 + 903 = 208593
Step 232: 208593 + 903 = 209496
Step 233: 209496 + 903 = 210399
Step 234: 210399 + 903 = 211302
Step 235: 211302 + 903 = 212205
Step 236: 212205 + 903 = 213108
Step 237: 213108 + 903 = 214011
Step 238: 214011 + 903 = 214914
Step 239: 214914 + 903 = 215817
Step 240: 215817 + 903 = 216720
Step 241: 216720 + 903 = 217623
Step 242: 217623 + 903 = 218526
Step 243: 218526 + 903 = 219429
Step 244: 219429 + 903 = 220332
Step 245: 220332 + 903 = 221235
Step 246: 221235 + 903 = 222138
Step 247: 222138 + 903 = 223041
Step 248: 223041 + 903 = 223944
Step 249: 223944 + 903 = 224847
Step 250: 224847 + 903 = 225750
Step 251: 225750 + 903 = 226653
Step 252: 226653 + 903 = 227556
Step 253: 227556 + 903 = 228459
Step 254: 228459 + 903 = 229362
Step 255: 229362 + 903 = 230265
Step 256: 230265 + 903 = 231168
Step 257: 231168 + 903 = 232071
Step 258: 232071 + 903 = 232974
Step 259: 232974 + 903 = 233877
Step 260: 233877 + 903 = 234780
Step 261: 234780 + 903 = 235683
Step 262: 235683 + 903 = 236586
Step 263: 236586 + 903 = 237489
Step 264: 237489 + 903 = 238392
Step 265: 238392 + 903 = 239295
Step 266: 239295 + 903 = 240198
Step 267: 240198 + 903 = 241101
Step 268: 241101 + 903 = 242004
Step 269: 242004 + 903 = 242907
Step 270: 242907 + 903 = 243810
Step 271: 243810 + 903 = 244713
Step 272: 244713 + 903 = 245616
Step 273: 245616 + 903 = 246519
Step 274: 246519 + 903 = 247422
Step 275: 247422 + 903 = 248325
Step 276: 248325 + 903 = 249228
Step 277: 249228 + 903 = 250131
Step 278: 250131 + 903 = 251034
Step 279: 251034 + 903 = 251937
Step 280: 251937 + 903 = 252840
Step 281: 252840 + 903 = 253743
Step 282: 253743 + 903 = 254646
Step 283: 254646 + 903 = 255549
Step 284: 255549 + 903 = 256452
Step 285: 256452 + 903 = 257355
Step 286: 257355 + 903 = 258258
Step 287: 258258 + 903 = 259161
Step 288: 259161 + 903 = 260064
Step 289: 260064 + 903 = 260967
Step 290: 260967 + 903 = 261870
Step 291: 261870 + 903 = 262773
Step 292: 262773 + 903 = 263676
Step 293: 263676 + 903 = 264579
Step 294: 264579 + 903 = 265482
Step 295: 265482 + 903 = 266385
Step 296: 266385 + 903 = 267288
Step 297: 267288 + 903 = 268191
Step 298: 268191 + 903 = 269094
Step 299: 269094 + 903 = 269997
Step 300: 269997 + 903 = 270900
Step 301: 270900 + 903 = 271803
Step 302: 271803 + 903 = 272706
Step 303: 272706 + 903 = 273609
Step 304: 273609 + 903 = 274512
Step 305: 274512 + 903 = 275415
Step 306: 275415 + 903 = 276318
Step 307: 276318 + 903 = 277221
Step 308: 277221 + 903 = 278124
Step 309: 278124 + 903 = 279027
Step 310: 279027 + 903 = 279930
Step 311: 279930 + 903 = 280833
Step 312: 280833 + 903 = 281736
Step 313: 281736 + 903 = 282639
Step 314: 282639 + 903 = 283542
Step 315: 283542 + 903 = 284445
Step 316: 284445 + 903 = 285348
Step 317: 285348 + 903 = 286251
Step 318: 286251 + 903 = 287154
Step 319: 287154 + 903 = 288057
Step 320: 288057 + 903 = 288960
Step 321: 288960 + 903 = 289863
Step 322: 289863 + 903 = 290766
Step 323: 290766 + 903 = 291669
Step 324: 291669 + 903 = 292572
Step 325: 292572 + 903 = 293475
Step 326: 293475 + 903 = 294378
Step 327: 294378 + 903 = 295281
Step 328: 295281 + 903 = 296184
Step 329: 296184 + 903 = 297087
Step 330: 297087 + 903 = 297990
Step 331: 297990 + 903 = 298893
Step 332: 298893 + 903 = 299796
Step 333: 299796 + 903 = 300699
Step 334: 300699 + 903 = 301602
Step 335: 301602 + 903 = 302505
Step 336: 302505 + 903 = 303408
Step 337: 303408 + 903 = 304311
Step 338: 304311 + 903 = 305214
Step 339: 305214 + 903 = 306117
Step 340: 306117 + 903 = 307020
Step 341: 307020 + 903 = 307923
Step 342: 307923 + 903 = 308826
Step 343: 308826 + 903 = 309729
Step 344: 309729 + 903 = 310632
Step 345: 310632 + 903 = 311535
Step 346: 311535 + 903 = 312438
Step 347: 312438 + 903 = 313341
Step 348: 313341 + 903 = 314244
Step 349: 314244 + 903 = 315147
Step 350: 315147 + 903 = 316050
Step 351: 316050 + 903 = 316953
Step 352: 316953 + 903 = 317856
Step 353: 317856 + 903 = 318759
Step 354: 318759 + 903 = 319662
Step 355: 319662 + 903 = 320565
Step 356: 320565 + 903 = 321468
Step 357: 321468 + 903 = 322371
Step 358: 322371 + 903 = 323274
Step 359: 323274 + 903 = 324177
Step 360: 324177 + 903 = 325080
Step 361: 325080 + 903 = 325983
Step 362: 325983 + 903 = 326886
Step 363: 326886 + 903 = 327789
Step 364: 327789 + 903 = 328692
Step 365: 328692 + 903 = 329595
Step 366: 329595 + 903 = 330498
Step 367: 330498 + 903 = 331401
Step 368: 331401 + 903 = 332304
Step 369: 332304 + 903 = 333207
Step 370: 333207 + 903 = 334110
Step 371: 334110 + 903 = 335013
Step 372: 335013 + 903 = 335916
Step 373: 335916 + 903 = 336819
Step 374: 336819 + 903 = 337722
Step 375: 337722 + 903 = 338625
Step 376: 338625 + 903 = 339528
Step 377: 339528 + 903 = 340431
Step 378: 340431 + 903 = 341334
Step 379: 341334 + 903 = 342237
Step 380: 342237 + 903 = 343140
Step 381: 343140 + 903 = 344043
Step 382: 344043 + 903 = 344946
Step 383: 344946 + 903 = 345849
Step 384: 345849 + 903 = 346752
Step 385: 346752 + 903 = 347655
Step 386: 347655 + 903 = 348558
Step 387: 348558 + 903 = 349461
Step 388: 349461 + 903 = 350364
Step 389: 350364 + 903 = 351267
Step 390: 351267 + 903 = 352170
Step 391: 352170 + 903 = 353073
Step 392: 353073 + 903 = 353976
Step 393: 353976 + 903 = 354879
Step 394: 354879 + 903 = 355782
Step 395: 355782 + 903 = 356685
Step 396: 356685 + 903 = 357588
Step 397: 357588 + 903 = 358491
Step 398: 358491 + 903 = 359394
Step 399: 359394 + 903 = 360297
Step 400: 360297 + 903 = 361200
Step 401: 361200 + 903 = 362103
Step 402: 362103 + 903 = 363006
Step 403: 363006 + 903 = 363909
Step 404: 363909 + 903 = 364812
Step 405: 364812 + 903 = 365715
Step 406: 365715 + 903 = 366618
Step 407: 366618 + 903 = 367521
Step 408: 367521 + 903 = 368424
Step 409: 368424 + 903 = 369327
Step 410: 369327 + 903 = 370230
Step 411: 370230 + 903 = 371133
Step 412: 371133 + 903 = 372036
Step 413: 372036 + 903 = 372939
Step 414: 372939 + 903 = 373842
Step 415: 373842 + 903 = 374745
Step 416: 374745 + 903 = 375648
Step 417: 375648 + 903 = 376551
Step 418: 376551 + 903 = 377454
Step 419: 377454 + 903 = 378357
Step 420: 378357 + 903 = 379260
Step 421: 379260 + 903 = 380163
Step 422: 380163 + 903 = 381066
Step 423: 381066 + 903 = 381969

So, 903*423 = 381969