Alright, let's solve this math problem step by step. First, we have the number 842. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 355. So, we're going to take the number 842 and add it to itself 355 times.
Step 1: 0 + 842 = 842
Step 2: 842 + 842 = 1684
Step 3: 1684 + 842 = 2526
Step 4: 2526 + 842 = 3368
Step 5: 3368 + 842 = 4210
Step 6: 4210 + 842 = 5052
Step 7: 5052 + 842 = 5894
Step 8: 5894 + 842 = 6736
Step 9: 6736 + 842 = 7578
Step 10: 7578 + 842 = 8420
Step 11: 8420 + 842 = 9262
Step 12: 9262 + 842 = 10104
Step 13: 10104 + 842 = 10946
Step 14: 10946 + 842 = 11788
Step 15: 11788 + 842 = 12630
Step 16: 12630 + 842 = 13472
Step 17: 13472 + 842 = 14314
Step 18: 14314 + 842 = 15156
Step 19: 15156 + 842 = 15998
Step 20: 15998 + 842 = 16840
Step 21: 16840 + 842 = 17682
Step 22: 17682 + 842 = 18524
Step 23: 18524 + 842 = 19366
Step 24: 19366 + 842 = 20208
Step 25: 20208 + 842 = 21050
Step 26: 21050 + 842 = 21892
Step 27: 21892 + 842 = 22734
Step 28: 22734 + 842 = 23576
Step 29: 23576 + 842 = 24418
Step 30: 24418 + 842 = 25260
Step 31: 25260 + 842 = 26102
Step 32: 26102 + 842 = 26944
Step 33: 26944 + 842 = 27786
Step 34: 27786 + 842 = 28628
Step 35: 28628 + 842 = 29470
Step 36: 29470 + 842 = 30312
Step 37: 30312 + 842 = 31154
Step 38: 31154 + 842 = 31996
Step 39: 31996 + 842 = 32838
Step 40: 32838 + 842 = 33680
Step 41: 33680 + 842 = 34522
Step 42: 34522 + 842 = 35364
Step 43: 35364 + 842 = 36206
Step 44: 36206 + 842 = 37048
Step 45: 37048 + 842 = 37890
Step 46: 37890 + 842 = 38732
Step 47: 38732 + 842 = 39574
Step 48: 39574 + 842 = 40416
Step 49: 40416 + 842 = 41258
Step 50: 41258 + 842 = 42100
Step 51: 42100 + 842 = 42942
Step 52: 42942 + 842 = 43784
Step 53: 43784 + 842 = 44626
Step 54: 44626 + 842 = 45468
Step 55: 45468 + 842 = 46310
Step 56: 46310 + 842 = 47152
Step 57: 47152 + 842 = 47994
Step 58: 47994 + 842 = 48836
Step 59: 48836 + 842 = 49678
Step 60: 49678 + 842 = 50520
Step 61: 50520 + 842 = 51362
Step 62: 51362 + 842 = 52204
Step 63: 52204 + 842 = 53046
Step 64: 53046 + 842 = 53888
Step 65: 53888 + 842 = 54730
Step 66: 54730 + 842 = 55572
Step 67: 55572 + 842 = 56414
Step 68: 56414 + 842 = 57256
Step 69: 57256 + 842 = 58098
Step 70: 58098 + 842 = 58940
Step 71: 58940 + 842 = 59782
Step 72: 59782 + 842 = 60624
Step 73: 60624 + 842 = 61466
Step 74: 61466 + 842 = 62308
Step 75: 62308 + 842 = 63150
Step 76: 63150 + 842 = 63992
Step 77: 63992 + 842 = 64834
Step 78: 64834 + 842 = 65676
Step 79: 65676 + 842 = 66518
Step 80: 66518 + 842 = 67360
Step 81: 67360 + 842 = 68202
Step 82: 68202 + 842 = 69044
Step 83: 69044 + 842 = 69886
Step 84: 69886 + 842 = 70728
Step 85: 70728 + 842 = 71570
Step 86: 71570 + 842 = 72412
Step 87: 72412 + 842 = 73254
Step 88: 73254 + 842 = 74096
Step 89: 74096 + 842 = 74938
Step 90: 74938 + 842 = 75780
Step 91: 75780 + 842 = 76622
Step 92: 76622 + 842 = 77464
Step 93: 77464 + 842 = 78306
Step 94: 78306 + 842 = 79148
Step 95: 79148 + 842 = 79990
Step 96: 79990 + 842 = 80832
Step 97: 80832 + 842 = 81674
Step 98: 81674 + 842 = 82516
Step 99: 82516 + 842 = 83358
Step 100: 83358 + 842 = 84200
Step 101: 84200 + 842 = 85042
Step 102: 85042 + 842 = 85884
Step 103: 85884 + 842 = 86726
Step 104: 86726 + 842 = 87568
Step 105: 87568 + 842 = 88410
Step 106: 88410 + 842 = 89252
Step 107: 89252 + 842 = 90094
Step 108: 90094 + 842 = 90936
Step 109: 90936 + 842 = 91778
Step 110: 91778 + 842 = 92620
Step 111: 92620 + 842 = 93462
Step 112: 93462 + 842 = 94304
Step 113: 94304 + 842 = 95146
Step 114: 95146 + 842 = 95988
Step 115: 95988 + 842 = 96830
Step 116: 96830 + 842 = 97672
Step 117: 97672 + 842 = 98514
Step 118: 98514 + 842 = 99356
Step 119: 99356 + 842 = 100198
Step 120: 100198 + 842 = 101040
Step 121: 101040 + 842 = 101882
Step 122: 101882 + 842 = 102724
Step 123: 102724 + 842 = 103566
Step 124: 103566 + 842 = 104408
Step 125: 104408 + 842 = 105250
Step 126: 105250 + 842 = 106092
Step 127: 106092 + 842 = 106934
Step 128: 106934 + 842 = 107776
Step 129: 107776 + 842 = 108618
Step 130: 108618 + 842 = 109460
Step 131: 109460 + 842 = 110302
Step 132: 110302 + 842 = 111144
Step 133: 111144 + 842 = 111986
Step 134: 111986 + 842 = 112828
Step 135: 112828 + 842 = 113670
Step 136: 113670 + 842 = 114512
Step 137: 114512 + 842 = 115354
Step 138: 115354 + 842 = 116196
Step 139: 116196 + 842 = 117038
Step 140: 117038 + 842 = 117880
Step 141: 117880 + 842 = 118722
Step 142: 118722 + 842 = 119564
Step 143: 119564 + 842 = 120406
Step 144: 120406 + 842 = 121248
Step 145: 121248 + 842 = 122090
Step 146: 122090 + 842 = 122932
Step 147: 122932 + 842 = 123774
Step 148: 123774 + 842 = 124616
Step 149: 124616 + 842 = 125458
Step 150: 125458 + 842 = 126300
Step 151: 126300 + 842 = 127142
Step 152: 127142 + 842 = 127984
Step 153: 127984 + 842 = 128826
Step 154: 128826 + 842 = 129668
Step 155: 129668 + 842 = 130510
Step 156: 130510 + 842 = 131352
Step 157: 131352 + 842 = 132194
Step 158: 132194 + 842 = 133036
Step 159: 133036 + 842 = 133878
Step 160: 133878 + 842 = 134720
Step 161: 134720 + 842 = 135562
Step 162: 135562 + 842 = 136404
Step 163: 136404 + 842 = 137246
Step 164: 137246 + 842 = 138088
Step 165: 138088 + 842 = 138930
Step 166: 138930 + 842 = 139772
Step 167: 139772 + 842 = 140614
Step 168: 140614 + 842 = 141456
Step 169: 141456 + 842 = 142298
Step 170: 142298 + 842 = 143140
Step 171: 143140 + 842 = 143982
Step 172: 143982 + 842 = 144824
Step 173: 144824 + 842 = 145666
Step 174: 145666 + 842 = 146508
Step 175: 146508 + 842 = 147350
Step 176: 147350 + 842 = 148192
Step 177: 148192 + 842 = 149034
Step 178: 149034 + 842 = 149876
Step 179: 149876 + 842 = 150718
Step 180: 150718 + 842 = 151560
Step 181: 151560 + 842 = 152402
Step 182: 152402 + 842 = 153244
Step 183: 153244 + 842 = 154086
Step 184: 154086 + 842 = 154928
Step 185: 154928 + 842 = 155770
Step 186: 155770 + 842 = 156612
Step 187: 156612 + 842 = 157454
Step 188: 157454 + 842 = 158296
Step 189: 158296 + 842 = 159138
Step 190: 159138 + 842 = 159980
Step 191: 159980 + 842 = 160822
Step 192: 160822 + 842 = 161664
Step 193: 161664 + 842 = 162506
Step 194: 162506 + 842 = 163348
Step 195: 163348 + 842 = 164190
Step 196: 164190 + 842 = 165032
Step 197: 165032 + 842 = 165874
Step 198: 165874 + 842 = 166716
Step 199: 166716 + 842 = 167558
Step 200: 167558 + 842 = 168400
Step 201: 168400 + 842 = 169242
Step 202: 169242 + 842 = 170084
Step 203: 170084 + 842 = 170926
Step 204: 170926 + 842 = 171768
Step 205: 171768 + 842 = 172610
Step 206: 172610 + 842 = 173452
Step 207: 173452 + 842 = 174294
Step 208: 174294 + 842 = 175136
Step 209: 175136 + 842 = 175978
Step 210: 175978 + 842 = 176820
Step 211: 176820 + 842 = 177662
Step 212: 177662 + 842 = 178504
Step 213: 178504 + 842 = 179346
Step 214: 179346 + 842 = 180188
Step 215: 180188 + 842 = 181030
Step 216: 181030 + 842 = 181872
Step 217: 181872 + 842 = 182714
Step 218: 182714 + 842 = 183556
Step 219: 183556 + 842 = 184398
Step 220: 184398 + 842 = 185240
Step 221: 185240 + 842 = 186082
Step 222: 186082 + 842 = 186924
Step 223: 186924 + 842 = 187766
Step 224: 187766 + 842 = 188608
Step 225: 188608 + 842 = 189450
Step 226: 189450 + 842 = 190292
Step 227: 190292 + 842 = 191134
Step 228: 191134 + 842 = 191976
Step 229: 191976 + 842 = 192818
Step 230: 192818 + 842 = 193660
Step 231: 193660 + 842 = 194502
Step 232: 194502 + 842 = 195344
Step 233: 195344 + 842 = 196186
Step 234: 196186 + 842 = 197028
Step 235: 197028 + 842 = 197870
Step 236: 197870 + 842 = 198712
Step 237: 198712 + 842 = 199554
Step 238: 199554 + 842 = 200396
Step 239: 200396 + 842 = 201238
Step 240: 201238 + 842 = 202080
Step 241: 202080 + 842 = 202922
Step 242: 202922 + 842 = 203764
Step 243: 203764 + 842 = 204606
Step 244: 204606 + 842 = 205448
Step 245: 205448 + 842 = 206290
Step 246: 206290 + 842 = 207132
Step 247: 207132 + 842 = 207974
Step 248: 207974 + 842 = 208816
Step 249: 208816 + 842 = 209658
Step 250: 209658 + 842 = 210500
Step 251: 210500 + 842 = 211342
Step 252: 211342 + 842 = 212184
Step 253: 212184 + 842 = 213026
Step 254: 213026 + 842 = 213868
Step 255: 213868 + 842 = 214710
Step 256: 214710 + 842 = 215552
Step 257: 215552 + 842 = 216394
Step 258: 216394 + 842 = 217236
Step 259: 217236 + 842 = 218078
Step 260: 218078 + 842 = 218920
Step 261: 218920 + 842 = 219762
Step 262: 219762 + 842 = 220604
Step 263: 220604 + 842 = 221446
Step 264: 221446 + 842 = 222288
Step 265: 222288 + 842 = 223130
Step 266: 223130 + 842 = 223972
Step 267: 223972 + 842 = 224814
Step 268: 224814 + 842 = 225656
Step 269: 225656 + 842 = 226498
Step 270: 226498 + 842 = 227340
Step 271: 227340 + 842 = 228182
Step 272: 228182 + 842 = 229024
Step 273: 229024 + 842 = 229866
Step 274: 229866 + 842 = 230708
Step 275: 230708 + 842 = 231550
Step 276: 231550 + 842 = 232392
Step 277: 232392 + 842 = 233234
Step 278: 233234 + 842 = 234076
Step 279: 234076 + 842 = 234918
Step 280: 234918 + 842 = 235760
Step 281: 235760 + 842 = 236602
Step 282: 236602 + 842 = 237444
Step 283: 237444 + 842 = 238286
Step 284: 238286 + 842 = 239128
Step 285: 239128 + 842 = 239970
Step 286: 239970 + 842 = 240812
Step 287: 240812 + 842 = 241654
Step 288: 241654 + 842 = 242496
Step 289: 242496 + 842 = 243338
Step 290: 243338 + 842 = 244180
Step 291: 244180 + 842 = 245022
Step 292: 245022 + 842 = 245864
Step 293: 245864 + 842 = 246706
Step 294: 246706 + 842 = 247548
Step 295: 247548 + 842 = 248390
Step 296: 248390 + 842 = 249232
Step 297: 249232 + 842 = 250074
Step 298: 250074 + 842 = 250916
Step 299: 250916 + 842 = 251758
Step 300: 251758 + 842 = 252600
Step 301: 252600 + 842 = 253442
Step 302: 253442 + 842 = 254284
Step 303: 254284 + 842 = 255126
Step 304: 255126 + 842 = 255968
Step 305: 255968 + 842 = 256810
Step 306: 256810 + 842 = 257652
Step 307: 257652 + 842 = 258494
Step 308: 258494 + 842 = 259336
Step 309: 259336 + 842 = 260178
Step 310: 260178 + 842 = 261020
Step 311: 261020 + 842 = 261862
Step 312: 261862 + 842 = 262704
Step 313: 262704 + 842 = 263546
Step 314: 263546 + 842 = 264388
Step 315: 264388 + 842 = 265230
Step 316: 265230 + 842 = 266072
Step 317: 266072 + 842 = 266914
Step 318: 266914 + 842 = 267756
Step 319: 267756 + 842 = 268598
Step 320: 268598 + 842 = 269440
Step 321: 269440 + 842 = 270282
Step 322: 270282 + 842 = 271124
Step 323: 271124 + 842 = 271966
Step 324: 271966 + 842 = 272808
Step 325: 272808 + 842 = 273650
Step 326: 273650 + 842 = 274492
Step 327: 274492 + 842 = 275334
Step 328: 275334 + 842 = 276176
Step 329: 276176 + 842 = 277018
Step 330: 277018 + 842 = 277860
Step 331: 277860 + 842 = 278702
Step 332: 278702 + 842 = 279544
Step 333: 279544 + 842 = 280386
Step 334: 280386 + 842 = 281228
Step 335: 281228 + 842 = 282070
Step 336: 282070 + 842 = 282912
Step 337: 282912 + 842 = 283754
Step 338: 283754 + 842 = 284596
Step 339: 284596 + 842 = 285438
Step 340: 285438 + 842 = 286280
Step 341: 286280 + 842 = 287122
Step 342: 287122 + 842 = 287964
Step 343: 287964 + 842 = 288806
Step 344: 288806 + 842 = 289648
Step 345: 289648 + 842 = 290490
Step 346: 290490 + 842 = 291332
Step 347: 291332 + 842 = 292174
Step 348: 292174 + 842 = 293016
Step 349: 293016 + 842 = 293858
Step 350: 293858 + 842 = 294700
Step 351: 294700 + 842 = 295542
Step 352: 295542 + 842 = 296384
Step 353: 296384 + 842 = 297226
Step 354: 297226 + 842 = 298068
Step 355: 298068 + 842 = 298910

So, 842*355 = 298910