Sure thing, let's get straight to it. We start with 909 and we're going to multiply it by 428, which means adding 909 to itself 428 times.
Step 1: 0 + 909 = 909
Step 2: 909 + 909 = 1818
Step 3: 1818 + 909 = 2727
Step 4: 2727 + 909 = 3636
Step 5: 3636 + 909 = 4545
Step 6: 4545 + 909 = 5454
Step 7: 5454 + 909 = 6363
Step 8: 6363 + 909 = 7272
Step 9: 7272 + 909 = 8181
Step 10: 8181 + 909 = 9090
Step 11: 9090 + 909 = 9999
Step 12: 9999 + 909 = 10908
Step 13: 10908 + 909 = 11817
Step 14: 11817 + 909 = 12726
Step 15: 12726 + 909 = 13635
Step 16: 13635 + 909 = 14544
Step 17: 14544 + 909 = 15453
Step 18: 15453 + 909 = 16362
Step 19: 16362 + 909 = 17271
Step 20: 17271 + 909 = 18180
Step 21: 18180 + 909 = 19089
Step 22: 19089 + 909 = 19998
Step 23: 19998 + 909 = 20907
Step 24: 20907 + 909 = 21816
Step 25: 21816 + 909 = 22725
Step 26: 22725 + 909 = 23634
Step 27: 23634 + 909 = 24543
Step 28: 24543 + 909 = 25452
Step 29: 25452 + 909 = 26361
Step 30: 26361 + 909 = 27270
Step 31: 27270 + 909 = 28179
Step 32: 28179 + 909 = 29088
Step 33: 29088 + 909 = 29997
Step 34: 29997 + 909 = 30906
Step 35: 30906 + 909 = 31815
Step 36: 31815 + 909 = 32724
Step 37: 32724 + 909 = 33633
Step 38: 33633 + 909 = 34542
Step 39: 34542 + 909 = 35451
Step 40: 35451 + 909 = 36360
Step 41: 36360 + 909 = 37269
Step 42: 37269 + 909 = 38178
Step 43: 38178 + 909 = 39087
Step 44: 39087 + 909 = 39996
Step 45: 39996 + 909 = 40905
Step 46: 40905 + 909 = 41814
Step 47: 41814 + 909 = 42723
Step 48: 42723 + 909 = 43632
Step 49: 43632 + 909 = 44541
Step 50: 44541 + 909 = 45450
Step 51: 45450 + 909 = 46359
Step 52: 46359 + 909 = 47268
Step 53: 47268 + 909 = 48177
Step 54: 48177 + 909 = 49086
Step 55: 49086 + 909 = 49995
Step 56: 49995 + 909 = 50904
Step 57: 50904 + 909 = 51813
Step 58: 51813 + 909 = 52722
Step 59: 52722 + 909 = 53631
Step 60: 53631 + 909 = 54540
Step 61: 54540 + 909 = 55449
Step 62: 55449 + 909 = 56358
Step 63: 56358 + 909 = 57267
Step 64: 57267 + 909 = 58176
Step 65: 58176 + 909 = 59085
Step 66: 59085 + 909 = 59994
Step 67: 59994 + 909 = 60903
Step 68: 60903 + 909 = 61812
Step 69: 61812 + 909 = 62721
Step 70: 62721 + 909 = 63630
Step 71: 63630 + 909 = 64539
Step 72: 64539 + 909 = 65448
Step 73: 65448 + 909 = 66357
Step 74: 66357 + 909 = 67266
Step 75: 67266 + 909 = 68175
Step 76: 68175 + 909 = 69084
Step 77: 69084 + 909 = 69993
Step 78: 69993 + 909 = 70902
Step 79: 70902 + 909 = 71811
Step 80: 71811 + 909 = 72720
Step 81: 72720 + 909 = 73629
Step 82: 73629 + 909 = 74538
Step 83: 74538 + 909 = 75447
Step 84: 75447 + 909 = 76356
Step 85: 76356 + 909 = 77265
Step 86: 77265 + 909 = 78174
Step 87: 78174 + 909 = 79083
Step 88: 79083 + 909 = 79992
Step 89: 79992 + 909 = 80901
Step 90: 80901 + 909 = 81810
Step 91: 81810 + 909 = 82719
Step 92: 82719 + 909 = 83628
Step 93: 83628 + 909 = 84537
Step 94: 84537 + 909 = 85446
Step 95: 85446 + 909 = 86355
Step 96: 86355 + 909 = 87264
Step 97: 87264 + 909 = 88173
Step 98: 88173 + 909 = 89082
Step 99: 89082 + 909 = 89991
Step 100: 89991 + 909 = 90900
Step 101: 90900 + 909 = 91809
Step 102: 91809 + 909 = 92718
Step 103: 92718 + 909 = 93627
Step 104: 93627 + 909 = 94536
Step 105: 94536 + 909 = 95445
Step 106: 95445 + 909 = 96354
Step 107: 96354 + 909 = 97263
Step 108: 97263 + 909 = 98172
Step 109: 98172 + 909 = 99081
Step 110: 99081 + 909 = 99990
Step 111: 99990 + 909 = 100899
Step 112: 100899 + 909 = 101808
Step 113: 101808 + 909 = 102717
Step 114: 102717 + 909 = 103626
Step 115: 103626 + 909 = 104535
Step 116: 104535 + 909 = 105444
Step 117: 105444 + 909 = 106353
Step 118: 106353 + 909 = 107262
Step 119: 107262 + 909 = 108171
Step 120: 108171 + 909 = 109080
Step 121: 109080 + 909 = 109989
Step 122: 109989 + 909 = 110898
Step 123: 110898 + 909 = 111807
Step 124: 111807 + 909 = 112716
Step 125: 112716 + 909 = 113625
Step 126: 113625 + 909 = 114534
Step 127: 114534 + 909 = 115443
Step 128: 115443 + 909 = 116352
Step 129: 116352 + 909 = 117261
Step 130: 117261 + 909 = 118170
Step 131: 118170 + 909 = 119079
Step 132: 119079 + 909 = 119988
Step 133: 119988 + 909 = 120897
Step 134: 120897 + 909 = 121806
Step 135: 121806 + 909 = 122715
Step 136: 122715 + 909 = 123624
Step 137: 123624 + 909 = 124533
Step 138: 124533 + 909 = 125442
Step 139: 125442 + 909 = 126351
Step 140: 126351 + 909 = 127260
Step 141: 127260 + 909 = 128169
Step 142: 128169 + 909 = 129078
Step 143: 129078 + 909 = 129987
Step 144: 129987 + 909 = 130896
Step 145: 130896 + 909 = 131805
Step 146: 131805 + 909 = 132714
Step 147: 132714 + 909 = 133623
Step 148: 133623 + 909 = 134532
Step 149: 134532 + 909 = 135441
Step 150: 135441 + 909 = 136350
Step 151: 136350 + 909 = 137259
Step 152: 137259 + 909 = 138168
Step 153: 138168 + 909 = 139077
Step 154: 139077 + 909 = 139986
Step 155: 139986 + 909 = 140895
Step 156: 140895 + 909 = 141804
Step 157: 141804 + 909 = 142713
Step 158: 142713 + 909 = 143622
Step 159: 143622 + 909 = 144531
Step 160: 144531 + 909 = 145440
Step 161: 145440 + 909 = 146349
Step 162: 146349 + 909 = 147258
Step 163: 147258 + 909 = 148167
Step 164: 148167 + 909 = 149076
Step 165: 149076 + 909 = 149985
Step 166: 149985 + 909 = 150894
Step 167: 150894 + 909 = 151803
Step 168: 151803 + 909 = 152712
Step 169: 152712 + 909 = 153621
Step 170: 153621 + 909 = 154530
Step 171: 154530 + 909 = 155439
Step 172: 155439 + 909 = 156348
Step 173: 156348 + 909 = 157257
Step 174: 157257 + 909 = 158166
Step 175: 158166 + 909 = 159075
Step 176: 159075 + 909 = 159984
Step 177: 159984 + 909 = 160893
Step 178: 160893 + 909 = 161802
Step 179: 161802 + 909 = 162711
Step 180: 162711 + 909 = 163620
Step 181: 163620 + 909 = 164529
Step 182: 164529 + 909 = 165438
Step 183: 165438 + 909 = 166347
Step 184: 166347 + 909 = 167256
Step 185: 167256 + 909 = 168165
Step 186: 168165 + 909 = 169074
Step 187: 169074 + 909 = 169983
Step 188: 169983 + 909 = 170892
Step 189: 170892 + 909 = 171801
Step 190: 171801 + 909 = 172710
Step 191: 172710 + 909 = 173619
Step 192: 173619 + 909 = 174528
Step 193: 174528 + 909 = 175437
Step 194: 175437 + 909 = 176346
Step 195: 176346 + 909 = 177255
Step 196: 177255 + 909 = 178164
Step 197: 178164 + 909 = 179073
Step 198: 179073 + 909 = 179982
Step 199: 179982 + 909 = 180891
Step 200: 180891 + 909 = 181800
Step 201: 181800 + 909 = 182709
Step 202: 182709 + 909 = 183618
Step 203: 183618 + 909 = 184527
Step 204: 184527 + 909 = 185436
Step 205: 185436 + 909 = 186345
Step 206: 186345 + 909 = 187254
Step 207: 187254 + 909 = 188163
Step 208: 188163 + 909 = 189072
Step 209: 189072 + 909 = 189981
Step 210: 189981 + 909 = 190890
Step 211: 190890 + 909 = 191799
Step 212: 191799 + 909 = 192708
Step 213: 192708 + 909 = 193617
Step 214: 193617 + 909 = 194526
Step 215: 194526 + 909 = 195435
Step 216: 195435 + 909 = 196344
Step 217: 196344 + 909 = 197253
Step 218: 197253 + 909 = 198162
Step 219: 198162 + 909 = 199071
Step 220: 199071 + 909 = 199980
Step 221: 199980 + 909 = 200889
Step 222: 200889 + 909 = 201798
Step 223: 201798 + 909 = 202707
Step 224: 202707 + 909 = 203616
Step 225: 203616 + 909 = 204525
Step 226: 204525 + 909 = 205434
Step 227: 205434 + 909 = 206343
Step 228: 206343 + 909 = 207252
Step 229: 207252 + 909 = 208161
Step 230: 208161 + 909 = 209070
Step 231: 209070 + 909 = 209979
Step 232: 209979 + 909 = 210888
Step 233: 210888 + 909 = 211797
Step 234: 211797 + 909 = 212706
Step 235: 212706 + 909 = 213615
Step 236: 213615 + 909 = 214524
Step 237: 214524 + 909 = 215433
Step 238: 215433 + 909 = 216342
Step 239: 216342 + 909 = 217251
Step 240: 217251 + 909 = 218160
Step 241: 218160 + 909 = 219069
Step 242: 219069 + 909 = 219978
Step 243: 219978 + 909 = 220887
Step 244: 220887 + 909 = 221796
Step 245: 221796 + 909 = 222705
Step 246: 222705 + 909 = 223614
Step 247: 223614 + 909 = 224523
Step 248: 224523 + 909 = 225432
Step 249: 225432 + 909 = 226341
Step 250: 226341 + 909 = 227250
Step 251: 227250 + 909 = 228159
Step 252: 228159 + 909 = 229068
Step 253: 229068 + 909 = 229977
Step 254: 229977 + 909 = 230886
Step 255: 230886 + 909 = 231795
Step 256: 231795 + 909 = 232704
Step 257: 232704 + 909 = 233613
Step 258: 233613 + 909 = 234522
Step 259: 234522 + 909 = 235431
Step 260: 235431 + 909 = 236340
Step 261: 236340 + 909 = 237249
Step 262: 237249 + 909 = 238158
Step 263: 238158 + 909 = 239067
Step 264: 239067 + 909 = 239976
Step 265: 239976 + 909 = 240885
Step 266: 240885 + 909 = 241794
Step 267: 241794 + 909 = 242703
Step 268: 242703 + 909 = 243612
Step 269: 243612 + 909 = 244521
Step 270: 244521 + 909 = 245430
Step 271: 245430 + 909 = 246339
Step 272: 246339 + 909 = 247248
Step 273: 247248 + 909 = 248157
Step 274: 248157 + 909 = 249066
Step 275: 249066 + 909 = 249975
Step 276: 249975 + 909 = 250884
Step 277: 250884 + 909 = 251793
Step 278: 251793 + 909 = 252702
Step 279: 252702 + 909 = 253611
Step 280: 253611 + 909 = 254520
Step 281: 254520 + 909 = 255429
Step 282: 255429 + 909 = 256338
Step 283: 256338 + 909 = 257247
Step 284: 257247 + 909 = 258156
Step 285: 258156 + 909 = 259065
Step 286: 259065 + 909 = 259974
Step 287: 259974 + 909 = 260883
Step 288: 260883 + 909 = 261792
Step 289: 261792 + 909 = 262701
Step 290: 262701 + 909 = 263610
Step 291: 263610 + 909 = 264519
Step 292: 264519 + 909 = 265428
Step 293: 265428 + 909 = 266337
Step 294: 266337 + 909 = 267246
Step 295: 267246 + 909 = 268155
Step 296: 268155 + 909 = 269064
Step 297: 269064 + 909 = 269973
Step 298: 269973 + 909 = 270882
Step 299: 270882 + 909 = 271791
Step 300: 271791 + 909 = 272700
Step 301: 272700 + 909 = 273609
Step 302: 273609 + 909 = 274518
Step 303: 274518 + 909 = 275427
Step 304: 275427 + 909 = 276336
Step 305: 276336 + 909 = 277245
Step 306: 277245 + 909 = 278154
Step 307: 278154 + 909 = 279063
Step 308: 279063 + 909 = 279972
Step 309: 279972 + 909 = 280881
Step 310: 280881 + 909 = 281790
Step 311: 281790 + 909 = 282699
Step 312: 282699 + 909 = 283608
Step 313: 283608 + 909 = 284517
Step 314: 284517 + 909 = 285426
Step 315: 285426 + 909 = 286335
Step 316: 286335 + 909 = 287244
Step 317: 287244 + 909 = 288153
Step 318: 288153 + 909 = 289062
Step 319: 289062 + 909 = 289971
Step 320: 289971 + 909 = 290880
Step 321: 290880 + 909 = 291789
Step 322: 291789 + 909 = 292698
Step 323: 292698 + 909 = 293607
Step 324: 293607 + 909 = 294516
Step 325: 294516 + 909 = 295425
Step 326: 295425 + 909 = 296334
Step 327: 296334 + 909 = 297243
Step 328: 297243 + 909 = 298152
Step 329: 298152 + 909 = 299061
Step 330: 299061 + 909 = 299970
Step 331: 299970 + 909 = 300879
Step 332: 300879 + 909 = 301788
Step 333: 301788 + 909 = 302697
Step 334: 302697 + 909 = 303606
Step 335: 303606 + 909 = 304515
Step 336: 304515 + 909 = 305424
Step 337: 305424 + 909 = 306333
Step 338: 306333 + 909 = 307242
Step 339: 307242 + 909 = 308151
Step 340: 308151 + 909 = 309060
Step 341: 309060 + 909 = 309969
Step 342: 309969 + 909 = 310878
Step 343: 310878 + 909 = 311787
Step 344: 311787 + 909 = 312696
Step 345: 312696 + 909 = 313605
Step 346: 313605 + 909 = 314514
Step 347: 314514 + 909 = 315423
Step 348: 315423 + 909 = 316332
Step 349: 316332 + 909 = 317241
Step 350: 317241 + 909 = 318150
Step 351: 318150 + 909 = 319059
Step 352: 319059 + 909 = 319968
Step 353: 319968 + 909 = 320877
Step 354: 320877 + 909 = 321786
Step 355: 321786 + 909 = 322695
Step 356: 322695 + 909 = 323604
Step 357: 323604 + 909 = 324513
Step 358: 324513 + 909 = 325422
Step 359: 325422 + 909 = 326331
Step 360: 326331 + 909 = 327240
Step 361: 327240 + 909 = 328149
Step 362: 328149 + 909 = 329058
Step 363: 329058 + 909 = 329967
Step 364: 329967 + 909 = 330876
Step 365: 330876 + 909 = 331785
Step 366: 331785 + 909 = 332694
Step 367: 332694 + 909 = 333603
Step 368: 333603 + 909 = 334512
Step 369: 334512 + 909 = 335421
Step 370: 335421 + 909 = 336330
Step 371: 336330 + 909 = 337239
Step 372: 337239 + 909 = 338148
Step 373: 338148 + 909 = 339057
Step 374: 339057 + 909 = 339966
Step 375: 339966 + 909 = 340875
Step 376: 340875 + 909 = 341784
Step 377: 341784 + 909 = 342693
Step 378: 342693 + 909 = 343602
Step 379: 343602 + 909 = 344511
Step 380: 344511 + 909 = 345420
Step 381: 345420 + 909 = 346329
Step 382: 346329 + 909 = 347238
Step 383: 347238 + 909 = 348147
Step 384: 348147 + 909 = 349056
Step 385: 349056 + 909 = 349965
Step 386: 349965 + 909 = 350874
Step 387: 350874 + 909 = 351783
Step 388: 351783 + 909 = 352692
Step 389: 352692 + 909 = 353601
Step 390: 353601 + 909 = 354510
Step 391: 354510 + 909 = 355419
Step 392: 355419 + 909 = 356328
Step 393: 356328 + 909 = 357237
Step 394: 357237 + 909 = 358146
Step 395: 358146 + 909 = 359055
Step 396: 359055 + 909 = 359964
Step 397: 359964 + 909 = 360873
Step 398: 360873 + 909 = 361782
Step 399: 361782 + 909 = 362691
Step 400: 362691 + 909 = 363600
Step 401: 363600 + 909 = 364509
Step 402: 364509 + 909 = 365418
Step 403: 365418 + 909 = 366327
Step 404: 366327 + 909 = 367236
Step 405: 367236 + 909 = 368145
Step 406: 368145 + 909 = 369054
Step 407: 369054 + 909 = 369963
Step 408: 369963 + 909 = 370872
Step 409: 370872 + 909 = 371781
Step 410: 371781 + 909 = 372690
Step 411: 372690 + 909 = 373599
Step 412: 373599 + 909 = 374508
Step 413: 374508 + 909 = 375417
Step 414: 375417 + 909 = 376326
Step 415: 376326 + 909 = 377235
Step 416: 377235 + 909 = 378144
Step 417: 378144 + 909 = 379053
Step 418: 379053 + 909 = 379962
Step 419: 379962 + 909 = 380871
Step 420: 380871 + 909 = 381780
Step 421: 381780 + 909 = 382689
Step 422: 382689 + 909 = 383598
Step 423: 383598 + 909 = 384507
Step 424: 384507 + 909 = 385416
Step 425: 385416 + 909 = 386325
Step 426: 386325 + 909 = 387234
Step 427: 387234 + 909 = 388143
Step 428: 388143 + 909 = 389052

So, 909*428 = 389052