Alright, let's solve this math problem step by step. First, we have the number 839. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 258. So, we're going to take the number 839 and add it to itself 258 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

So, 839*258 = 216462