Without delay, let's solve this. We've got 899 and we will be multiplying it by 427, that is, adding 899 to itself 427 times.
Step 1: 0 + 899 = 899
Step 2: 899 + 899 = 1798
Step 3: 1798 + 899 = 2697
Step 4: 2697 + 899 = 3596
Step 5: 3596 + 899 = 4495
Step 6: 4495 + 899 = 5394
Step 7: 5394 + 899 = 6293
Step 8: 6293 + 899 = 7192
Step 9: 7192 + 899 = 8091
Step 10: 8091 + 899 = 8990
Step 11: 8990 + 899 = 9889
Step 12: 9889 + 899 = 10788
Step 13: 10788 + 899 = 11687
Step 14: 11687 + 899 = 12586
Step 15: 12586 + 899 = 13485
Step 16: 13485 + 899 = 14384
Step 17: 14384 + 899 = 15283
Step 18: 15283 + 899 = 16182
Step 19: 16182 + 899 = 17081
Step 20: 17081 + 899 = 17980
Step 21: 17980 + 899 = 18879
Step 22: 18879 + 899 = 19778
Step 23: 19778 + 899 = 20677
Step 24: 20677 + 899 = 21576
Step 25: 21576 + 899 = 22475
Step 26: 22475 + 899 = 23374
Step 27: 23374 + 899 = 24273
Step 28: 24273 + 899 = 25172
Step 29: 25172 + 899 = 26071
Step 30: 26071 + 899 = 26970
Step 31: 26970 + 899 = 27869
Step 32: 27869 + 899 = 28768
Step 33: 28768 + 899 = 29667
Step 34: 29667 + 899 = 30566
Step 35: 30566 + 899 = 31465
Step 36: 31465 + 899 = 32364
Step 37: 32364 + 899 = 33263
Step 38: 33263 + 899 = 34162
Step 39: 34162 + 899 = 35061
Step 40: 35061 + 899 = 35960
Step 41: 35960 + 899 = 36859
Step 42: 36859 + 899 = 37758
Step 43: 37758 + 899 = 38657
Step 44: 38657 + 899 = 39556
Step 45: 39556 + 899 = 40455
Step 46: 40455 + 899 = 41354
Step 47: 41354 + 899 = 42253
Step 48: 42253 + 899 = 43152
Step 49: 43152 + 899 = 44051
Step 50: 44051 + 899 = 44950
Step 51: 44950 + 899 = 45849
Step 52: 45849 + 899 = 46748
Step 53: 46748 + 899 = 47647
Step 54: 47647 + 899 = 48546
Step 55: 48546 + 899 = 49445
Step 56: 49445 + 899 = 50344
Step 57: 50344 + 899 = 51243
Step 58: 51243 + 899 = 52142
Step 59: 52142 + 899 = 53041
Step 60: 53041 + 899 = 53940
Step 61: 53940 + 899 = 54839
Step 62: 54839 + 899 = 55738
Step 63: 55738 + 899 = 56637
Step 64: 56637 + 899 = 57536
Step 65: 57536 + 899 = 58435
Step 66: 58435 + 899 = 59334
Step 67: 59334 + 899 = 60233
Step 68: 60233 + 899 = 61132
Step 69: 61132 + 899 = 62031
Step 70: 62031 + 899 = 62930
Step 71: 62930 + 899 = 63829
Step 72: 63829 + 899 = 64728
Step 73: 64728 + 899 = 65627
Step 74: 65627 + 899 = 66526
Step 75: 66526 + 899 = 67425
Step 76: 67425 + 899 = 68324
Step 77: 68324 + 899 = 69223
Step 78: 69223 + 899 = 70122
Step 79: 70122 + 899 = 71021
Step 80: 71021 + 899 = 71920
Step 81: 71920 + 899 = 72819
Step 82: 72819 + 899 = 73718
Step 83: 73718 + 899 = 74617
Step 84: 74617 + 899 = 75516
Step 85: 75516 + 899 = 76415
Step 86: 76415 + 899 = 77314
Step 87: 77314 + 899 = 78213
Step 88: 78213 + 899 = 79112
Step 89: 79112 + 899 = 80011
Step 90: 80011 + 899 = 80910
Step 91: 80910 + 899 = 81809
Step 92: 81809 + 899 = 82708
Step 93: 82708 + 899 = 83607
Step 94: 83607 + 899 = 84506
Step 95: 84506 + 899 = 85405
Step 96: 85405 + 899 = 86304
Step 97: 86304 + 899 = 87203
Step 98: 87203 + 899 = 88102
Step 99: 88102 + 899 = 89001
Step 100: 89001 + 899 = 89900
Step 101: 89900 + 899 = 90799
Step 102: 90799 + 899 = 91698
Step 103: 91698 + 899 = 92597
Step 104: 92597 + 899 = 93496
Step 105: 93496 + 899 = 94395
Step 106: 94395 + 899 = 95294
Step 107: 95294 + 899 = 96193
Step 108: 96193 + 899 = 97092
Step 109: 97092 + 899 = 97991
Step 110: 97991 + 899 = 98890
Step 111: 98890 + 899 = 99789
Step 112: 99789 + 899 = 100688
Step 113: 100688 + 899 = 101587
Step 114: 101587 + 899 = 102486
Step 115: 102486 + 899 = 103385
Step 116: 103385 + 899 = 104284
Step 117: 104284 + 899 = 105183
Step 118: 105183 + 899 = 106082
Step 119: 106082 + 899 = 106981
Step 120: 106981 + 899 = 107880
Step 121: 107880 + 899 = 108779
Step 122: 108779 + 899 = 109678
Step 123: 109678 + 899 = 110577
Step 124: 110577 + 899 = 111476
Step 125: 111476 + 899 = 112375
Step 126: 112375 + 899 = 113274
Step 127: 113274 + 899 = 114173
Step 128: 114173 + 899 = 115072
Step 129: 115072 + 899 = 115971
Step 130: 115971 + 899 = 116870
Step 131: 116870 + 899 = 117769
Step 132: 117769 + 899 = 118668
Step 133: 118668 + 899 = 119567
Step 134: 119567 + 899 = 120466
Step 135: 120466 + 899 = 121365
Step 136: 121365 + 899 = 122264
Step 137: 122264 + 899 = 123163
Step 138: 123163 + 899 = 124062
Step 139: 124062 + 899 = 124961
Step 140: 124961 + 899 = 125860
Step 141: 125860 + 899 = 126759
Step 142: 126759 + 899 = 127658
Step 143: 127658 + 899 = 128557
Step 144: 128557 + 899 = 129456
Step 145: 129456 + 899 = 130355
Step 146: 130355 + 899 = 131254
Step 147: 131254 + 899 = 132153
Step 148: 132153 + 899 = 133052
Step 149: 133052 + 899 = 133951
Step 150: 133951 + 899 = 134850
Step 151: 134850 + 899 = 135749
Step 152: 135749 + 899 = 136648
Step 153: 136648 + 899 = 137547
Step 154: 137547 + 899 = 138446
Step 155: 138446 + 899 = 139345
Step 156: 139345 + 899 = 140244
Step 157: 140244 + 899 = 141143
Step 158: 141143 + 899 = 142042
Step 159: 142042 + 899 = 142941
Step 160: 142941 + 899 = 143840
Step 161: 143840 + 899 = 144739
Step 162: 144739 + 899 = 145638
Step 163: 145638 + 899 = 146537
Step 164: 146537 + 899 = 147436
Step 165: 147436 + 899 = 148335
Step 166: 148335 + 899 = 149234
Step 167: 149234 + 899 = 150133
Step 168: 150133 + 899 = 151032
Step 169: 151032 + 899 = 151931
Step 170: 151931 + 899 = 152830
Step 171: 152830 + 899 = 153729
Step 172: 153729 + 899 = 154628
Step 173: 154628 + 899 = 155527
Step 174: 155527 + 899 = 156426
Step 175: 156426 + 899 = 157325
Step 176: 157325 + 899 = 158224
Step 177: 158224 + 899 = 159123
Step 178: 159123 + 899 = 160022
Step 179: 160022 + 899 = 160921
Step 180: 160921 + 899 = 161820
Step 181: 161820 + 899 = 162719
Step 182: 162719 + 899 = 163618
Step 183: 163618 + 899 = 164517
Step 184: 164517 + 899 = 165416
Step 185: 165416 + 899 = 166315
Step 186: 166315 + 899 = 167214
Step 187: 167214 + 899 = 168113
Step 188: 168113 + 899 = 169012
Step 189: 169012 + 899 = 169911
Step 190: 169911 + 899 = 170810
Step 191: 170810 + 899 = 171709
Step 192: 171709 + 899 = 172608
Step 193: 172608 + 899 = 173507
Step 194: 173507 + 899 = 174406
Step 195: 174406 + 899 = 175305
Step 196: 175305 + 899 = 176204
Step 197: 176204 + 899 = 177103
Step 198: 177103 + 899 = 178002
Step 199: 178002 + 899 = 178901
Step 200: 178901 + 899 = 179800
Step 201: 179800 + 899 = 180699
Step 202: 180699 + 899 = 181598
Step 203: 181598 + 899 = 182497
Step 204: 182497 + 899 = 183396
Step 205: 183396 + 899 = 184295
Step 206: 184295 + 899 = 185194
Step 207: 185194 + 899 = 186093
Step 208: 186093 + 899 = 186992
Step 209: 186992 + 899 = 187891
Step 210: 187891 + 899 = 188790
Step 211: 188790 + 899 = 189689
Step 212: 189689 + 899 = 190588
Step 213: 190588 + 899 = 191487
Step 214: 191487 + 899 = 192386
Step 215: 192386 + 899 = 193285
Step 216: 193285 + 899 = 194184
Step 217: 194184 + 899 = 195083
Step 218: 195083 + 899 = 195982
Step 219: 195982 + 899 = 196881
Step 220: 196881 + 899 = 197780
Step 221: 197780 + 899 = 198679
Step 222: 198679 + 899 = 199578
Step 223: 199578 + 899 = 200477
Step 224: 200477 + 899 = 201376
Step 225: 201376 + 899 = 202275
Step 226: 202275 + 899 = 203174
Step 227: 203174 + 899 = 204073
Step 228: 204073 + 899 = 204972
Step 229: 204972 + 899 = 205871
Step 230: 205871 + 899 = 206770
Step 231: 206770 + 899 = 207669
Step 232: 207669 + 899 = 208568
Step 233: 208568 + 899 = 209467
Step 234: 209467 + 899 = 210366
Step 235: 210366 + 899 = 211265
Step 236: 211265 + 899 = 212164
Step 237: 212164 + 899 = 213063
Step 238: 213063 + 899 = 213962
Step 239: 213962 + 899 = 214861
Step 240: 214861 + 899 = 215760
Step 241: 215760 + 899 = 216659
Step 242: 216659 + 899 = 217558
Step 243: 217558 + 899 = 218457
Step 244: 218457 + 899 = 219356
Step 245: 219356 + 899 = 220255
Step 246: 220255 + 899 = 221154
Step 247: 221154 + 899 = 222053
Step 248: 222053 + 899 = 222952
Step 249: 222952 + 899 = 223851
Step 250: 223851 + 899 = 224750
Step 251: 224750 + 899 = 225649
Step 252: 225649 + 899 = 226548
Step 253: 226548 + 899 = 227447
Step 254: 227447 + 899 = 228346
Step 255: 228346 + 899 = 229245
Step 256: 229245 + 899 = 230144
Step 257: 230144 + 899 = 231043
Step 258: 231043 + 899 = 231942
Step 259: 231942 + 899 = 232841
Step 260: 232841 + 899 = 233740
Step 261: 233740 + 899 = 234639
Step 262: 234639 + 899 = 235538
Step 263: 235538 + 899 = 236437
Step 264: 236437 + 899 = 237336
Step 265: 237336 + 899 = 238235
Step 266: 238235 + 899 = 239134
Step 267: 239134 + 899 = 240033
Step 268: 240033 + 899 = 240932
Step 269: 240932 + 899 = 241831
Step 270: 241831 + 899 = 242730
Step 271: 242730 + 899 = 243629
Step 272: 243629 + 899 = 244528
Step 273: 244528 + 899 = 245427
Step 274: 245427 + 899 = 246326
Step 275: 246326 + 899 = 247225
Step 276: 247225 + 899 = 248124
Step 277: 248124 + 899 = 249023
Step 278: 249023 + 899 = 249922
Step 279: 249922 + 899 = 250821
Step 280: 250821 + 899 = 251720
Step 281: 251720 + 899 = 252619
Step 282: 252619 + 899 = 253518
Step 283: 253518 + 899 = 254417
Step 284: 254417 + 899 = 255316
Step 285: 255316 + 899 = 256215
Step 286: 256215 + 899 = 257114
Step 287: 257114 + 899 = 258013
Step 288: 258013 + 899 = 258912
Step 289: 258912 + 899 = 259811
Step 290: 259811 + 899 = 260710
Step 291: 260710 + 899 = 261609
Step 292: 261609 + 899 = 262508
Step 293: 262508 + 899 = 263407
Step 294: 263407 + 899 = 264306
Step 295: 264306 + 899 = 265205
Step 296: 265205 + 899 = 266104
Step 297: 266104 + 899 = 267003
Step 298: 267003 + 899 = 267902
Step 299: 267902 + 899 = 268801
Step 300: 268801 + 899 = 269700
Step 301: 269700 + 899 = 270599
Step 302: 270599 + 899 = 271498
Step 303: 271498 + 899 = 272397
Step 304: 272397 + 899 = 273296
Step 305: 273296 + 899 = 274195
Step 306: 274195 + 899 = 275094
Step 307: 275094 + 899 = 275993
Step 308: 275993 + 899 = 276892
Step 309: 276892 + 899 = 277791
Step 310: 277791 + 899 = 278690
Step 311: 278690 + 899 = 279589
Step 312: 279589 + 899 = 280488
Step 313: 280488 + 899 = 281387
Step 314: 281387 + 899 = 282286
Step 315: 282286 + 899 = 283185
Step 316: 283185 + 899 = 284084
Step 317: 284084 + 899 = 284983
Step 318: 284983 + 899 = 285882
Step 319: 285882 + 899 = 286781
Step 320: 286781 + 899 = 287680
Step 321: 287680 + 899 = 288579
Step 322: 288579 + 899 = 289478
Step 323: 289478 + 899 = 290377
Step 324: 290377 + 899 = 291276
Step 325: 291276 + 899 = 292175
Step 326: 292175 + 899 = 293074
Step 327: 293074 + 899 = 293973
Step 328: 293973 + 899 = 294872
Step 329: 294872 + 899 = 295771
Step 330: 295771 + 899 = 296670
Step 331: 296670 + 899 = 297569
Step 332: 297569 + 899 = 298468
Step 333: 298468 + 899 = 299367
Step 334: 299367 + 899 = 300266
Step 335: 300266 + 899 = 301165
Step 336: 301165 + 899 = 302064
Step 337: 302064 + 899 = 302963
Step 338: 302963 + 899 = 303862
Step 339: 303862 + 899 = 304761
Step 340: 304761 + 899 = 305660
Step 341: 305660 + 899 = 306559
Step 342: 306559 + 899 = 307458
Step 343: 307458 + 899 = 308357
Step 344: 308357 + 899 = 309256
Step 345: 309256 + 899 = 310155
Step 346: 310155 + 899 = 311054
Step 347: 311054 + 899 = 311953
Step 348: 311953 + 899 = 312852
Step 349: 312852 + 899 = 313751
Step 350: 313751 + 899 = 314650
Step 351: 314650 + 899 = 315549
Step 352: 315549 + 899 = 316448
Step 353: 316448 + 899 = 317347
Step 354: 317347 + 899 = 318246
Step 355: 318246 + 899 = 319145
Step 356: 319145 + 899 = 320044
Step 357: 320044 + 899 = 320943
Step 358: 320943 + 899 = 321842
Step 359: 321842 + 899 = 322741
Step 360: 322741 + 899 = 323640
Step 361: 323640 + 899 = 324539
Step 362: 324539 + 899 = 325438
Step 363: 325438 + 899 = 326337
Step 364: 326337 + 899 = 327236
Step 365: 327236 + 899 = 328135
Step 366: 328135 + 899 = 329034
Step 367: 329034 + 899 = 329933
Step 368: 329933 + 899 = 330832
Step 369: 330832 + 899 = 331731
Step 370: 331731 + 899 = 332630
Step 371: 332630 + 899 = 333529
Step 372: 333529 + 899 = 334428
Step 373: 334428 + 899 = 335327
Step 374: 335327 + 899 = 336226
Step 375: 336226 + 899 = 337125
Step 376: 337125 + 899 = 338024
Step 377: 338024 + 899 = 338923
Step 378: 338923 + 899 = 339822
Step 379: 339822 + 899 = 340721
Step 380: 340721 + 899 = 341620
Step 381: 341620 + 899 = 342519
Step 382: 342519 + 899 = 343418
Step 383: 343418 + 899 = 344317
Step 384: 344317 + 899 = 345216
Step 385: 345216 + 899 = 346115
Step 386: 346115 + 899 = 347014
Step 387: 347014 + 899 = 347913
Step 388: 347913 + 899 = 348812
Step 389: 348812 + 899 = 349711
Step 390: 349711 + 899 = 350610
Step 391: 350610 + 899 = 351509
Step 392: 351509 + 899 = 352408
Step 393: 352408 + 899 = 353307
Step 394: 353307 + 899 = 354206
Step 395: 354206 + 899 = 355105
Step 396: 355105 + 899 = 356004
Step 397: 356004 + 899 = 356903
Step 398: 356903 + 899 = 357802
Step 399: 357802 + 899 = 358701
Step 400: 358701 + 899 = 359600
Step 401: 359600 + 899 = 360499
Step 402: 360499 + 899 = 361398
Step 403: 361398 + 899 = 362297
Step 404: 362297 + 899 = 363196
Step 405: 363196 + 899 = 364095
Step 406: 364095 + 899 = 364994
Step 407: 364994 + 899 = 365893
Step 408: 365893 + 899 = 366792
Step 409: 366792 + 899 = 367691
Step 410: 367691 + 899 = 368590
Step 411: 368590 + 899 = 369489
Step 412: 369489 + 899 = 370388
Step 413: 370388 + 899 = 371287
Step 414: 371287 + 899 = 372186
Step 415: 372186 + 899 = 373085
Step 416: 373085 + 899 = 373984
Step 417: 373984 + 899 = 374883
Step 418: 374883 + 899 = 375782
Step 419: 375782 + 899 = 376681
Step 420: 376681 + 899 = 377580
Step 421: 377580 + 899 = 378479
Step 422: 378479 + 899 = 379378
Step 423: 379378 + 899 = 380277
Step 424: 380277 + 899 = 381176
Step 425: 381176 + 899 = 382075
Step 426: 382075 + 899 = 382974
Step 427: 382974 + 899 = 383873

So, 899*427 = 383873