Without delay, let's solve this. We've got 863 and we will be multiplying it by 336, that is, adding 863 to itself 336 times.
Step 1: 0 + 863 = 863
Step 2: 863 + 863 = 1726
Step 3: 1726 + 863 = 2589
Step 4: 2589 + 863 = 3452
Step 5: 3452 + 863 = 4315
Step 6: 4315 + 863 = 5178
Step 7: 5178 + 863 = 6041
Step 8: 6041 + 863 = 6904
Step 9: 6904 + 863 = 7767
Step 10: 7767 + 863 = 8630
Step 11: 8630 + 863 = 9493
Step 12: 9493 + 863 = 10356
Step 13: 10356 + 863 = 11219
Step 14: 11219 + 863 = 12082
Step 15: 12082 + 863 = 12945
Step 16: 12945 + 863 = 13808
Step 17: 13808 + 863 = 14671
Step 18: 14671 + 863 = 15534
Step 19: 15534 + 863 = 16397
Step 20: 16397 + 863 = 17260
Step 21: 17260 + 863 = 18123
Step 22: 18123 + 863 = 18986
Step 23: 18986 + 863 = 19849
Step 24: 19849 + 863 = 20712
Step 25: 20712 + 863 = 21575
Step 26: 21575 + 863 = 22438
Step 27: 22438 + 863 = 23301
Step 28: 23301 + 863 = 24164
Step 29: 24164 + 863 = 25027
Step 30: 25027 + 863 = 25890
Step 31: 25890 + 863 = 26753
Step 32: 26753 + 863 = 27616
Step 33: 27616 + 863 = 28479
Step 34: 28479 + 863 = 29342
Step 35: 29342 + 863 = 30205
Step 36: 30205 + 863 = 31068
Step 37: 31068 + 863 = 31931
Step 38: 31931 + 863 = 32794
Step 39: 32794 + 863 = 33657
Step 40: 33657 + 863 = 34520
Step 41: 34520 + 863 = 35383
Step 42: 35383 + 863 = 36246
Step 43: 36246 + 863 = 37109
Step 44: 37109 + 863 = 37972
Step 45: 37972 + 863 = 38835
Step 46: 38835 + 863 = 39698
Step 47: 39698 + 863 = 40561
Step 48: 40561 + 863 = 41424
Step 49: 41424 + 863 = 42287
Step 50: 42287 + 863 = 43150
Step 51: 43150 + 863 = 44013
Step 52: 44013 + 863 = 44876
Step 53: 44876 + 863 = 45739
Step 54: 45739 + 863 = 46602
Step 55: 46602 + 863 = 47465
Step 56: 47465 + 863 = 48328
Step 57: 48328 + 863 = 49191
Step 58: 49191 + 863 = 50054
Step 59: 50054 + 863 = 50917
Step 60: 50917 + 863 = 51780
Step 61: 51780 + 863 = 52643
Step 62: 52643 + 863 = 53506
Step 63: 53506 + 863 = 54369
Step 64: 54369 + 863 = 55232
Step 65: 55232 + 863 = 56095
Step 66: 56095 + 863 = 56958
Step 67: 56958 + 863 = 57821
Step 68: 57821 + 863 = 58684
Step 69: 58684 + 863 = 59547
Step 70: 59547 + 863 = 60410
Step 71: 60410 + 863 = 61273
Step 72: 61273 + 863 = 62136
Step 73: 62136 + 863 = 62999
Step 74: 62999 + 863 = 63862
Step 75: 63862 + 863 = 64725
Step 76: 64725 + 863 = 65588
Step 77: 65588 + 863 = 66451
Step 78: 66451 + 863 = 67314
Step 79: 67314 + 863 = 68177
Step 80: 68177 + 863 = 69040
Step 81: 69040 + 863 = 69903
Step 82: 69903 + 863 = 70766
Step 83: 70766 + 863 = 71629
Step 84: 71629 + 863 = 72492
Step 85: 72492 + 863 = 73355
Step 86: 73355 + 863 = 74218
Step 87: 74218 + 863 = 75081
Step 88: 75081 + 863 = 75944
Step 89: 75944 + 863 = 76807
Step 90: 76807 + 863 = 77670
Step 91: 77670 + 863 = 78533
Step 92: 78533 + 863 = 79396
Step 93: 79396 + 863 = 80259
Step 94: 80259 + 863 = 81122
Step 95: 81122 + 863 = 81985
Step 96: 81985 + 863 = 82848
Step 97: 82848 + 863 = 83711
Step 98: 83711 + 863 = 84574
Step 99: 84574 + 863 = 85437
Step 100: 85437 + 863 = 86300
Step 101: 86300 + 863 = 87163
Step 102: 87163 + 863 = 88026
Step 103: 88026 + 863 = 88889
Step 104: 88889 + 863 = 89752
Step 105: 89752 + 863 = 90615
Step 106: 90615 + 863 = 91478
Step 107: 91478 + 863 = 92341
Step 108: 92341 + 863 = 93204
Step 109: 93204 + 863 = 94067
Step 110: 94067 + 863 = 94930
Step 111: 94930 + 863 = 95793
Step 112: 95793 + 863 = 96656
Step 113: 96656 + 863 = 97519
Step 114: 97519 + 863 = 98382
Step 115: 98382 + 863 = 99245
Step 116: 99245 + 863 = 100108
Step 117: 100108 + 863 = 100971
Step 118: 100971 + 863 = 101834
Step 119: 101834 + 863 = 102697
Step 120: 102697 + 863 = 103560
Step 121: 103560 + 863 = 104423
Step 122: 104423 + 863 = 105286
Step 123: 105286 + 863 = 106149
Step 124: 106149 + 863 = 107012
Step 125: 107012 + 863 = 107875
Step 126: 107875 + 863 = 108738
Step 127: 108738 + 863 = 109601
Step 128: 109601 + 863 = 110464
Step 129: 110464 + 863 = 111327
Step 130: 111327 + 863 = 112190
Step 131: 112190 + 863 = 113053
Step 132: 113053 + 863 = 113916
Step 133: 113916 + 863 = 114779
Step 134: 114779 + 863 = 115642
Step 135: 115642 + 863 = 116505
Step 136: 116505 + 863 = 117368
Step 137: 117368 + 863 = 118231
Step 138: 118231 + 863 = 119094
Step 139: 119094 + 863 = 119957
Step 140: 119957 + 863 = 120820
Step 141: 120820 + 863 = 121683
Step 142: 121683 + 863 = 122546
Step 143: 122546 + 863 = 123409
Step 144: 123409 + 863 = 124272
Step 145: 124272 + 863 = 125135
Step 146: 125135 + 863 = 125998
Step 147: 125998 + 863 = 126861
Step 148: 126861 + 863 = 127724
Step 149: 127724 + 863 = 128587
Step 150: 128587 + 863 = 129450
Step 151: 129450 + 863 = 130313
Step 152: 130313 + 863 = 131176
Step 153: 131176 + 863 = 132039
Step 154: 132039 + 863 = 132902
Step 155: 132902 + 863 = 133765
Step 156: 133765 + 863 = 134628
Step 157: 134628 + 863 = 135491
Step 158: 135491 + 863 = 136354
Step 159: 136354 + 863 = 137217
Step 160: 137217 + 863 = 138080
Step 161: 138080 + 863 = 138943
Step 162: 138943 + 863 = 139806
Step 163: 139806 + 863 = 140669
Step 164: 140669 + 863 = 141532
Step 165: 141532 + 863 = 142395
Step 166: 142395 + 863 = 143258
Step 167: 143258 + 863 = 144121
Step 168: 144121 + 863 = 144984
Step 169: 144984 + 863 = 145847
Step 170: 145847 + 863 = 146710
Step 171: 146710 + 863 = 147573
Step 172: 147573 + 863 = 148436
Step 173: 148436 + 863 = 149299
Step 174: 149299 + 863 = 150162
Step 175: 150162 + 863 = 151025
Step 176: 151025 + 863 = 151888
Step 177: 151888 + 863 = 152751
Step 178: 152751 + 863 = 153614
Step 179: 153614 + 863 = 154477
Step 180: 154477 + 863 = 155340
Step 181: 155340 + 863 = 156203
Step 182: 156203 + 863 = 157066
Step 183: 157066 + 863 = 157929
Step 184: 157929 + 863 = 158792
Step 185: 158792 + 863 = 159655
Step 186: 159655 + 863 = 160518
Step 187: 160518 + 863 = 161381
Step 188: 161381 + 863 = 162244
Step 189: 162244 + 863 = 163107
Step 190: 163107 + 863 = 163970
Step 191: 163970 + 863 = 164833
Step 192: 164833 + 863 = 165696
Step 193: 165696 + 863 = 166559
Step 194: 166559 + 863 = 167422
Step 195: 167422 + 863 = 168285
Step 196: 168285 + 863 = 169148
Step 197: 169148 + 863 = 170011
Step 198: 170011 + 863 = 170874
Step 199: 170874 + 863 = 171737
Step 200: 171737 + 863 = 172600
Step 201: 172600 + 863 = 173463
Step 202: 173463 + 863 = 174326
Step 203: 174326 + 863 = 175189
Step 204: 175189 + 863 = 176052
Step 205: 176052 + 863 = 176915
Step 206: 176915 + 863 = 177778
Step 207: 177778 + 863 = 178641
Step 208: 178641 + 863 = 179504
Step 209: 179504 + 863 = 180367
Step 210: 180367 + 863 = 181230
Step 211: 181230 + 863 = 182093
Step 212: 182093 + 863 = 182956
Step 213: 182956 + 863 = 183819
Step 214: 183819 + 863 = 184682
Step 215: 184682 + 863 = 185545
Step 216: 185545 + 863 = 186408
Step 217: 186408 + 863 = 187271
Step 218: 187271 + 863 = 188134
Step 219: 188134 + 863 = 188997
Step 220: 188997 + 863 = 189860
Step 221: 189860 + 863 = 190723
Step 222: 190723 + 863 = 191586
Step 223: 191586 + 863 = 192449
Step 224: 192449 + 863 = 193312
Step 225: 193312 + 863 = 194175
Step 226: 194175 + 863 = 195038
Step 227: 195038 + 863 = 195901
Step 228: 195901 + 863 = 196764
Step 229: 196764 + 863 = 197627
Step 230: 197627 + 863 = 198490
Step 231: 198490 + 863 = 199353
Step 232: 199353 + 863 = 200216
Step 233: 200216 + 863 = 201079
Step 234: 201079 + 863 = 201942
Step 235: 201942 + 863 = 202805
Step 236: 202805 + 863 = 203668
Step 237: 203668 + 863 = 204531
Step 238: 204531 + 863 = 205394
Step 239: 205394 + 863 = 206257
Step 240: 206257 + 863 = 207120
Step 241: 207120 + 863 = 207983
Step 242: 207983 + 863 = 208846
Step 243: 208846 + 863 = 209709
Step 244: 209709 + 863 = 210572
Step 245: 210572 + 863 = 211435
Step 246: 211435 + 863 = 212298
Step 247: 212298 + 863 = 213161
Step 248: 213161 + 863 = 214024
Step 249: 214024 + 863 = 214887
Step 250: 214887 + 863 = 215750
Step 251: 215750 + 863 = 216613
Step 252: 216613 + 863 = 217476
Step 253: 217476 + 863 = 218339
Step 254: 218339 + 863 = 219202
Step 255: 219202 + 863 = 220065
Step 256: 220065 + 863 = 220928
Step 257: 220928 + 863 = 221791
Step 258: 221791 + 863 = 222654
Step 259: 222654 + 863 = 223517
Step 260: 223517 + 863 = 224380
Step 261: 224380 + 863 = 225243
Step 262: 225243 + 863 = 226106
Step 263: 226106 + 863 = 226969
Step 264: 226969 + 863 = 227832
Step 265: 227832 + 863 = 228695
Step 266: 228695 + 863 = 229558
Step 267: 229558 + 863 = 230421
Step 268: 230421 + 863 = 231284
Step 269: 231284 + 863 = 232147
Step 270: 232147 + 863 = 233010
Step 271: 233010 + 863 = 233873
Step 272: 233873 + 863 = 234736
Step 273: 234736 + 863 = 235599
Step 274: 235599 + 863 = 236462
Step 275: 236462 + 863 = 237325
Step 276: 237325 + 863 = 238188
Step 277: 238188 + 863 = 239051
Step 278: 239051 + 863 = 239914
Step 279: 239914 + 863 = 240777
Step 280: 240777 + 863 = 241640
Step 281: 241640 + 863 = 242503
Step 282: 242503 + 863 = 243366
Step 283: 243366 + 863 = 244229
Step 284: 244229 + 863 = 245092
Step 285: 245092 + 863 = 245955
Step 286: 245955 + 863 = 246818
Step 287: 246818 + 863 = 247681
Step 288: 247681 + 863 = 248544
Step 289: 248544 + 863 = 249407
Step 290: 249407 + 863 = 250270
Step 291: 250270 + 863 = 251133
Step 292: 251133 + 863 = 251996
Step 293: 251996 + 863 = 252859
Step 294: 252859 + 863 = 253722
Step 295: 253722 + 863 = 254585
Step 296: 254585 + 863 = 255448
Step 297: 255448 + 863 = 256311
Step 298: 256311 + 863 = 257174
Step 299: 257174 + 863 = 258037
Step 300: 258037 + 863 = 258900
Step 301: 258900 + 863 = 259763
Step 302: 259763 + 863 = 260626
Step 303: 260626 + 863 = 261489
Step 304: 261489 + 863 = 262352
Step 305: 262352 + 863 = 263215
Step 306: 263215 + 863 = 264078
Step 307: 264078 + 863 = 264941
Step 308: 264941 + 863 = 265804
Step 309: 265804 + 863 = 266667
Step 310: 266667 + 863 = 267530
Step 311: 267530 + 863 = 268393
Step 312: 268393 + 863 = 269256
Step 313: 269256 + 863 = 270119
Step 314: 270119 + 863 = 270982
Step 315: 270982 + 863 = 271845
Step 316: 271845 + 863 = 272708
Step 317: 272708 + 863 = 273571
Step 318: 273571 + 863 = 274434
Step 319: 274434 + 863 = 275297
Step 320: 275297 + 863 = 276160
Step 321: 276160 + 863 = 277023
Step 322: 277023 + 863 = 277886
Step 323: 277886 + 863 = 278749
Step 324: 278749 + 863 = 279612
Step 325: 279612 + 863 = 280475
Step 326: 280475 + 863 = 281338
Step 327: 281338 + 863 = 282201
Step 328: 282201 + 863 = 283064
Step 329: 283064 + 863 = 283927
Step 330: 283927 + 863 = 284790
Step 331: 284790 + 863 = 285653
Step 332: 285653 + 863 = 286516
Step 333: 286516 + 863 = 287379
Step 334: 287379 + 863 = 288242
Step 335: 288242 + 863 = 289105
Step 336: 289105 + 863 = 289968

So, 863*336 = 289968