OK, let's crack this. We're given 839 and our task is to multiply it by 353. Essentially, we'll be adding 839 to itself 353 times.
Step 1: 0 + 839 = 839
Step 2: 839 + 839 = 1678
Step 3: 1678 + 839 = 2517
Step 4: 2517 + 839 = 3356
Step 5: 3356 + 839 = 4195
Step 6: 4195 + 839 = 5034
Step 7: 5034 + 839 = 5873
Step 8: 5873 + 839 = 6712
Step 9: 6712 + 839 = 7551
Step 10: 7551 + 839 = 8390
Step 11: 8390 + 839 = 9229
Step 12: 9229 + 839 = 10068
Step 13: 10068 + 839 = 10907
Step 14: 10907 + 839 = 11746
Step 15: 11746 + 839 = 12585
Step 16: 12585 + 839 = 13424
Step 17: 13424 + 839 = 14263
Step 18: 14263 + 839 = 15102
Step 19: 15102 + 839 = 15941
Step 20: 15941 + 839 = 16780
Step 21: 16780 + 839 = 17619
Step 22: 17619 + 839 = 18458
Step 23: 18458 + 839 = 19297
Step 24: 19297 + 839 = 20136
Step 25: 20136 + 839 = 20975
Step 26: 20975 + 839 = 21814
Step 27: 21814 + 839 = 22653
Step 28: 22653 + 839 = 23492
Step 29: 23492 + 839 = 24331
Step 30: 24331 + 839 = 25170
Step 31: 25170 + 839 = 26009
Step 32: 26009 + 839 = 26848
Step 33: 26848 + 839 = 27687
Step 34: 27687 + 839 = 28526
Step 35: 28526 + 839 = 29365
Step 36: 29365 + 839 = 30204
Step 37: 30204 + 839 = 31043
Step 38: 31043 + 839 = 31882
Step 39: 31882 + 839 = 32721
Step 40: 32721 + 839 = 33560
Step 41: 33560 + 839 = 34399
Step 42: 34399 + 839 = 35238
Step 43: 35238 + 839 = 36077
Step 44: 36077 + 839 = 36916
Step 45: 36916 + 839 = 37755
Step 46: 37755 + 839 = 38594
Step 47: 38594 + 839 = 39433
Step 48: 39433 + 839 = 40272
Step 49: 40272 + 839 = 41111
Step 50: 41111 + 839 = 41950
Step 51: 41950 + 839 = 42789
Step 52: 42789 + 839 = 43628
Step 53: 43628 + 839 = 44467
Step 54: 44467 + 839 = 45306
Step 55: 45306 + 839 = 46145
Step 56: 46145 + 839 = 46984
Step 57: 46984 + 839 = 47823
Step 58: 47823 + 839 = 48662
Step 59: 48662 + 839 = 49501
Step 60: 49501 + 839 = 50340
Step 61: 50340 + 839 = 51179
Step 62: 51179 + 839 = 52018
Step 63: 52018 + 839 = 52857
Step 64: 52857 + 839 = 53696
Step 65: 53696 + 839 = 54535
Step 66: 54535 + 839 = 55374
Step 67: 55374 + 839 = 56213
Step 68: 56213 + 839 = 57052
Step 69: 57052 + 839 = 57891
Step 70: 57891 + 839 = 58730
Step 71: 58730 + 839 = 59569
Step 72: 59569 + 839 = 60408
Step 73: 60408 + 839 = 61247
Step 74: 61247 + 839 = 62086
Step 75: 62086 + 839 = 62925
Step 76: 62925 + 839 = 63764
Step 77: 63764 + 839 = 64603
Step 78: 64603 + 839 = 65442
Step 79: 65442 + 839 = 66281
Step 80: 66281 + 839 = 67120
Step 81: 67120 + 839 = 67959
Step 82: 67959 + 839 = 68798
Step 83: 68798 + 839 = 69637
Step 84: 69637 + 839 = 70476
Step 85: 70476 + 839 = 71315
Step 86: 71315 + 839 = 72154
Step 87: 72154 + 839 = 72993
Step 88: 72993 + 839 = 73832
Step 89: 73832 + 839 = 74671
Step 90: 74671 + 839 = 75510
Step 91: 75510 + 839 = 76349
Step 92: 76349 + 839 = 77188
Step 93: 77188 + 839 = 78027
Step 94: 78027 + 839 = 78866
Step 95: 78866 + 839 = 79705
Step 96: 79705 + 839 = 80544
Step 97: 80544 + 839 = 81383
Step 98: 81383 + 839 = 82222
Step 99: 82222 + 839 = 83061
Step 100: 83061 + 839 = 83900
Step 101: 83900 + 839 = 84739
Step 102: 84739 + 839 = 85578
Step 103: 85578 + 839 = 86417
Step 104: 86417 + 839 = 87256
Step 105: 87256 + 839 = 88095
Step 106: 88095 + 839 = 88934
Step 107: 88934 + 839 = 89773
Step 108: 89773 + 839 = 90612
Step 109: 90612 + 839 = 91451
Step 110: 91451 + 839 = 92290
Step 111: 92290 + 839 = 93129
Step 112: 93129 + 839 = 93968
Step 113: 93968 + 839 = 94807
Step 114: 94807 + 839 = 95646
Step 115: 95646 + 839 = 96485
Step 116: 96485 + 839 = 97324
Step 117: 97324 + 839 = 98163
Step 118: 98163 + 839 = 99002
Step 119: 99002 + 839 = 99841
Step 120: 99841 + 839 = 100680
Step 121: 100680 + 839 = 101519
Step 122: 101519 + 839 = 102358
Step 123: 102358 + 839 = 103197
Step 124: 103197 + 839 = 104036
Step 125: 104036 + 839 = 104875
Step 126: 104875 + 839 = 105714
Step 127: 105714 + 839 = 106553
Step 128: 106553 + 839 = 107392
Step 129: 107392 + 839 = 108231
Step 130: 108231 + 839 = 109070
Step 131: 109070 + 839 = 109909
Step 132: 109909 + 839 = 110748
Step 133: 110748 + 839 = 111587
Step 134: 111587 + 839 = 112426
Step 135: 112426 + 839 = 113265
Step 136: 113265 + 839 = 114104
Step 137: 114104 + 839 = 114943
Step 138: 114943 + 839 = 115782
Step 139: 115782 + 839 = 116621
Step 140: 116621 + 839 = 117460
Step 141: 117460 + 839 = 118299
Step 142: 118299 + 839 = 119138
Step 143: 119138 + 839 = 119977
Step 144: 119977 + 839 = 120816
Step 145: 120816 + 839 = 121655
Step 146: 121655 + 839 = 122494
Step 147: 122494 + 839 = 123333
Step 148: 123333 + 839 = 124172
Step 149: 124172 + 839 = 125011
Step 150: 125011 + 839 = 125850
Step 151: 125850 + 839 = 126689
Step 152: 126689 + 839 = 127528
Step 153: 127528 + 839 = 128367
Step 154: 128367 + 839 = 129206
Step 155: 129206 + 839 = 130045
Step 156: 130045 + 839 = 130884
Step 157: 130884 + 839 = 131723
Step 158: 131723 + 839 = 132562
Step 159: 132562 + 839 = 133401
Step 160: 133401 + 839 = 134240
Step 161: 134240 + 839 = 135079
Step 162: 135079 + 839 = 135918
Step 163: 135918 + 839 = 136757
Step 164: 136757 + 839 = 137596
Step 165: 137596 + 839 = 138435
Step 166: 138435 + 839 = 139274
Step 167: 139274 + 839 = 140113
Step 168: 140113 + 839 = 140952
Step 169: 140952 + 839 = 141791
Step 170: 141791 + 839 = 142630
Step 171: 142630 + 839 = 143469
Step 172: 143469 + 839 = 144308
Step 173: 144308 + 839 = 145147
Step 174: 145147 + 839 = 145986
Step 175: 145986 + 839 = 146825
Step 176: 146825 + 839 = 147664
Step 177: 147664 + 839 = 148503
Step 178: 148503 + 839 = 149342
Step 179: 149342 + 839 = 150181
Step 180: 150181 + 839 = 151020
Step 181: 151020 + 839 = 151859
Step 182: 151859 + 839 = 152698
Step 183: 152698 + 839 = 153537
Step 184: 153537 + 839 = 154376
Step 185: 154376 + 839 = 155215
Step 186: 155215 + 839 = 156054
Step 187: 156054 + 839 = 156893
Step 188: 156893 + 839 = 157732
Step 189: 157732 + 839 = 158571
Step 190: 158571 + 839 = 159410
Step 191: 159410 + 839 = 160249
Step 192: 160249 + 839 = 161088
Step 193: 161088 + 839 = 161927
Step 194: 161927 + 839 = 162766
Step 195: 162766 + 839 = 163605
Step 196: 163605 + 839 = 164444
Step 197: 164444 + 839 = 165283
Step 198: 165283 + 839 = 166122
Step 199: 166122 + 839 = 166961
Step 200: 166961 + 839 = 167800
Step 201: 167800 + 839 = 168639
Step 202: 168639 + 839 = 169478
Step 203: 169478 + 839 = 170317
Step 204: 170317 + 839 = 171156
Step 205: 171156 + 839 = 171995
Step 206: 171995 + 839 = 172834
Step 207: 172834 + 839 = 173673
Step 208: 173673 + 839 = 174512
Step 209: 174512 + 839 = 175351
Step 210: 175351 + 839 = 176190
Step 211: 176190 + 839 = 177029
Step 212: 177029 + 839 = 177868
Step 213: 177868 + 839 = 178707
Step 214: 178707 + 839 = 179546
Step 215: 179546 + 839 = 180385
Step 216: 180385 + 839 = 181224
Step 217: 181224 + 839 = 182063
Step 218: 182063 + 839 = 182902
Step 219: 182902 + 839 = 183741
Step 220: 183741 + 839 = 184580
Step 221: 184580 + 839 = 185419
Step 222: 185419 + 839 = 186258
Step 223: 186258 + 839 = 187097
Step 224: 187097 + 839 = 187936
Step 225: 187936 + 839 = 188775
Step 226: 188775 + 839 = 189614
Step 227: 189614 + 839 = 190453
Step 228: 190453 + 839 = 191292
Step 229: 191292 + 839 = 192131
Step 230: 192131 + 839 = 192970
Step 231: 192970 + 839 = 193809
Step 232: 193809 + 839 = 194648
Step 233: 194648 + 839 = 195487
Step 234: 195487 + 839 = 196326
Step 235: 196326 + 839 = 197165
Step 236: 197165 + 839 = 198004
Step 237: 198004 + 839 = 198843
Step 238: 198843 + 839 = 199682
Step 239: 199682 + 839 = 200521
Step 240: 200521 + 839 = 201360
Step 241: 201360 + 839 = 202199
Step 242: 202199 + 839 = 203038
Step 243: 203038 + 839 = 203877
Step 244: 203877 + 839 = 204716
Step 245: 204716 + 839 = 205555
Step 246: 205555 + 839 = 206394
Step 247: 206394 + 839 = 207233
Step 248: 207233 + 839 = 208072
Step 249: 208072 + 839 = 208911
Step 250: 208911 + 839 = 209750
Step 251: 209750 + 839 = 210589
Step 252: 210589 + 839 = 211428
Step 253: 211428 + 839 = 212267
Step 254: 212267 + 839 = 213106
Step 255: 213106 + 839 = 213945
Step 256: 213945 + 839 = 214784
Step 257: 214784 + 839 = 215623
Step 258: 215623 + 839 = 216462
Step 259: 216462 + 839 = 217301
Step 260: 217301 + 839 = 218140
Step 261: 218140 + 839 = 218979
Step 262: 218979 + 839 = 219818
Step 263: 219818 + 839 = 220657
Step 264: 220657 + 839 = 221496
Step 265: 221496 + 839 = 222335
Step 266: 222335 + 839 = 223174
Step 267: 223174 + 839 = 224013
Step 268: 224013 + 839 = 224852
Step 269: 224852 + 839 = 225691
Step 270: 225691 + 839 = 226530
Step 271: 226530 + 839 = 227369
Step 272: 227369 + 839 = 228208
Step 273: 228208 + 839 = 229047
Step 274: 229047 + 839 = 229886
Step 275: 229886 + 839 = 230725
Step 276: 230725 + 839 = 231564
Step 277: 231564 + 839 = 232403
Step 278: 232403 + 839 = 233242
Step 279: 233242 + 839 = 234081
Step 280: 234081 + 839 = 234920
Step 281: 234920 + 839 = 235759
Step 282: 235759 + 839 = 236598
Step 283: 236598 + 839 = 237437
Step 284: 237437 + 839 = 238276
Step 285: 238276 + 839 = 239115
Step 286: 239115 + 839 = 239954
Step 287: 239954 + 839 = 240793
Step 288: 240793 + 839 = 241632
Step 289: 241632 + 839 = 242471
Step 290: 242471 + 839 = 243310
Step 291: 243310 + 839 = 244149
Step 292: 244149 + 839 = 244988
Step 293: 244988 + 839 = 245827
Step 294: 245827 + 839 = 246666
Step 295: 246666 + 839 = 247505
Step 296: 247505 + 839 = 248344
Step 297: 248344 + 839 = 249183
Step 298: 249183 + 839 = 250022
Step 299: 250022 + 839 = 250861
Step 300: 250861 + 839 = 251700
Step 301: 251700 + 839 = 252539
Step 302: 252539 + 839 = 253378
Step 303: 253378 + 839 = 254217
Step 304: 254217 + 839 = 255056
Step 305: 255056 + 839 = 255895
Step 306: 255895 + 839 = 256734
Step 307: 256734 + 839 = 257573
Step 308: 257573 + 839 = 258412
Step 309: 258412 + 839 = 259251
Step 310: 259251 + 839 = 260090
Step 311: 260090 + 839 = 260929
Step 312: 260929 + 839 = 261768
Step 313: 261768 + 839 = 262607
Step 314: 262607 + 839 = 263446
Step 315: 263446 + 839 = 264285
Step 316: 264285 + 839 = 265124
Step 317: 265124 + 839 = 265963
Step 318: 265963 + 839 = 266802
Step 319: 266802 + 839 = 267641
Step 320: 267641 + 839 = 268480
Step 321: 268480 + 839 = 269319
Step 322: 269319 + 839 = 270158
Step 323: 270158 + 839 = 270997
Step 324: 270997 + 839 = 271836
Step 325: 271836 + 839 = 272675
Step 326: 272675 + 839 = 273514
Step 327: 273514 + 839 = 274353
Step 328: 274353 + 839 = 275192
Step 329: 275192 + 839 = 276031
Step 330: 276031 + 839 = 276870
Step 331: 276870 + 839 = 277709
Step 332: 277709 + 839 = 278548
Step 333: 278548 + 839 = 279387
Step 334: 279387 + 839 = 280226
Step 335: 280226 + 839 = 281065
Step 336: 281065 + 839 = 281904
Step 337: 281904 + 839 = 282743
Step 338: 282743 + 839 = 283582
Step 339: 283582 + 839 = 284421
Step 340: 284421 + 839 = 285260
Step 341: 285260 + 839 = 286099
Step 342: 286099 + 839 = 286938
Step 343: 286938 + 839 = 287777
Step 344: 287777 + 839 = 288616
Step 345: 288616 + 839 = 289455
Step 346: 289455 + 839 = 290294
Step 347: 290294 + 839 = 291133
Step 348: 291133 + 839 = 291972
Step 349: 291972 + 839 = 292811
Step 350: 292811 + 839 = 293650
Step 351: 293650 + 839 = 294489
Step 352: 294489 + 839 = 295328
Step 353: 295328 + 839 = 296167

So, 839*353 = 296167