OK, let's work through this together. We're starting with 321 and we're going to multiply it by 381, which means we add 321 to itself 381 times.
Step 1: 0 + 321 = 321
Step 2: 321 + 321 = 642
Step 3: 642 + 321 = 963
Step 4: 963 + 321 = 1284
Step 5: 1284 + 321 = 1605
Step 6: 1605 + 321 = 1926
Step 7: 1926 + 321 = 2247
Step 8: 2247 + 321 = 2568
Step 9: 2568 + 321 = 2889
Step 10: 2889 + 321 = 3210
Step 11: 3210 + 321 = 3531
Step 12: 3531 + 321 = 3852
Step 13: 3852 + 321 = 4173
Step 14: 4173 + 321 = 4494
Step 15: 4494 + 321 = 4815
Step 16: 4815 + 321 = 5136
Step 17: 5136 + 321 = 5457
Step 18: 5457 + 321 = 5778
Step 19: 5778 + 321 = 6099
Step 20: 6099 + 321 = 6420
Step 21: 6420 + 321 = 6741
Step 22: 6741 + 321 = 7062
Step 23: 7062 + 321 = 7383
Step 24: 7383 + 321 = 7704
Step 25: 7704 + 321 = 8025
Step 26: 8025 + 321 = 8346
Step 27: 8346 + 321 = 8667
Step 28: 8667 + 321 = 8988
Step 29: 8988 + 321 = 9309
Step 30: 9309 + 321 = 9630
Step 31: 9630 + 321 = 9951
Step 32: 9951 + 321 = 10272
Step 33: 10272 + 321 = 10593
Step 34: 10593 + 321 = 10914
Step 35: 10914 + 321 = 11235
Step 36: 11235 + 321 = 11556
Step 37: 11556 + 321 = 11877
Step 38: 11877 + 321 = 12198
Step 39: 12198 + 321 = 12519
Step 40: 12519 + 321 = 12840
Step 41: 12840 + 321 = 13161
Step 42: 13161 + 321 = 13482
Step 43: 13482 + 321 = 13803
Step 44: 13803 + 321 = 14124
Step 45: 14124 + 321 = 14445
Step 46: 14445 + 321 = 14766
Step 47: 14766 + 321 = 15087
Step 48: 15087 + 321 = 15408
Step 49: 15408 + 321 = 15729
Step 50: 15729 + 321 = 16050
Step 51: 16050 + 321 = 16371
Step 52: 16371 + 321 = 16692
Step 53: 16692 + 321 = 17013
Step 54: 17013 + 321 = 17334
Step 55: 17334 + 321 = 17655
Step 56: 17655 + 321 = 17976
Step 57: 17976 + 321 = 18297
Step 58: 18297 + 321 = 18618
Step 59: 18618 + 321 = 18939
Step 60: 18939 + 321 = 19260
Step 61: 19260 + 321 = 19581
Step 62: 19581 + 321 = 19902
Step 63: 19902 + 321 = 20223
Step 64: 20223 + 321 = 20544
Step 65: 20544 + 321 = 20865
Step 66: 20865 + 321 = 21186
Step 67: 21186 + 321 = 21507
Step 68: 21507 + 321 = 21828
Step 69: 21828 + 321 = 22149
Step 70: 22149 + 321 = 22470
Step 71: 22470 + 321 = 22791
Step 72: 22791 + 321 = 23112
Step 73: 23112 + 321 = 23433
Step 74: 23433 + 321 = 23754
Step 75: 23754 + 321 = 24075
Step 76: 24075 + 321 = 24396
Step 77: 24396 + 321 = 24717
Step 78: 24717 + 321 = 25038
Step 79: 25038 + 321 = 25359
Step 80: 25359 + 321 = 25680
Step 81: 25680 + 321 = 26001
Step 82: 26001 + 321 = 26322
Step 83: 26322 + 321 = 26643
Step 84: 26643 + 321 = 26964
Step 85: 26964 + 321 = 27285
Step 86: 27285 + 321 = 27606
Step 87: 27606 + 321 = 27927
Step 88: 27927 + 321 = 28248
Step 89: 28248 + 321 = 28569
Step 90: 28569 + 321 = 28890
Step 91: 28890 + 321 = 29211
Step 92: 29211 + 321 = 29532
Step 93: 29532 + 321 = 29853
Step 94: 29853 + 321 = 30174
Step 95: 30174 + 321 = 30495
Step 96: 30495 + 321 = 30816
Step 97: 30816 + 321 = 31137
Step 98: 31137 + 321 = 31458
Step 99: 31458 + 321 = 31779
Step 100: 31779 + 321 = 32100
Step 101: 32100 + 321 = 32421
Step 102: 32421 + 321 = 32742
Step 103: 32742 + 321 = 33063
Step 104: 33063 + 321 = 33384
Step 105: 33384 + 321 = 33705
Step 106: 33705 + 321 = 34026
Step 107: 34026 + 321 = 34347
Step 108: 34347 + 321 = 34668
Step 109: 34668 + 321 = 34989
Step 110: 34989 + 321 = 35310
Step 111: 35310 + 321 = 35631
Step 112: 35631 + 321 = 35952
Step 113: 35952 + 321 = 36273
Step 114: 36273 + 321 = 36594
Step 115: 36594 + 321 = 36915
Step 116: 36915 + 321 = 37236
Step 117: 37236 + 321 = 37557
Step 118: 37557 + 321 = 37878
Step 119: 37878 + 321 = 38199
Step 120: 38199 + 321 = 38520
Step 121: 38520 + 321 = 38841
Step 122: 38841 + 321 = 39162
Step 123: 39162 + 321 = 39483
Step 124: 39483 + 321 = 39804
Step 125: 39804 + 321 = 40125
Step 126: 40125 + 321 = 40446
Step 127: 40446 + 321 = 40767
Step 128: 40767 + 321 = 41088
Step 129: 41088 + 321 = 41409
Step 130: 41409 + 321 = 41730
Step 131: 41730 + 321 = 42051
Step 132: 42051 + 321 = 42372
Step 133: 42372 + 321 = 42693
Step 134: 42693 + 321 = 43014
Step 135: 43014 + 321 = 43335
Step 136: 43335 + 321 = 43656
Step 137: 43656 + 321 = 43977
Step 138: 43977 + 321 = 44298
Step 139: 44298 + 321 = 44619
Step 140: 44619 + 321 = 44940
Step 141: 44940 + 321 = 45261
Step 142: 45261 + 321 = 45582
Step 143: 45582 + 321 = 45903
Step 144: 45903 + 321 = 46224
Step 145: 46224 + 321 = 46545
Step 146: 46545 + 321 = 46866
Step 147: 46866 + 321 = 47187
Step 148: 47187 + 321 = 47508
Step 149: 47508 + 321 = 47829
Step 150: 47829 + 321 = 48150
Step 151: 48150 + 321 = 48471
Step 152: 48471 + 321 = 48792
Step 153: 48792 + 321 = 49113
Step 154: 49113 + 321 = 49434
Step 155: 49434 + 321 = 49755
Step 156: 49755 + 321 = 50076
Step 157: 50076 + 321 = 50397
Step 158: 50397 + 321 = 50718
Step 159: 50718 + 321 = 51039
Step 160: 51039 + 321 = 51360
Step 161: 51360 + 321 = 51681
Step 162: 51681 + 321 = 52002
Step 163: 52002 + 321 = 52323
Step 164: 52323 + 321 = 52644
Step 165: 52644 + 321 = 52965
Step 166: 52965 + 321 = 53286
Step 167: 53286 + 321 = 53607
Step 168: 53607 + 321 = 53928
Step 169: 53928 + 321 = 54249
Step 170: 54249 + 321 = 54570
Step 171: 54570 + 321 = 54891
Step 172: 54891 + 321 = 55212
Step 173: 55212 + 321 = 55533
Step 174: 55533 + 321 = 55854
Step 175: 55854 + 321 = 56175
Step 176: 56175 + 321 = 56496
Step 177: 56496 + 321 = 56817
Step 178: 56817 + 321 = 57138
Step 179: 57138 + 321 = 57459
Step 180: 57459 + 321 = 57780
Step 181: 57780 + 321 = 58101
Step 182: 58101 + 321 = 58422
Step 183: 58422 + 321 = 58743
Step 184: 58743 + 321 = 59064
Step 185: 59064 + 321 = 59385
Step 186: 59385 + 321 = 59706
Step 187: 59706 + 321 = 60027
Step 188: 60027 + 321 = 60348
Step 189: 60348 + 321 = 60669
Step 190: 60669 + 321 = 60990
Step 191: 60990 + 321 = 61311
Step 192: 61311 + 321 = 61632
Step 193: 61632 + 321 = 61953
Step 194: 61953 + 321 = 62274
Step 195: 62274 + 321 = 62595
Step 196: 62595 + 321 = 62916
Step 197: 62916 + 321 = 63237
Step 198: 63237 + 321 = 63558
Step 199: 63558 + 321 = 63879
Step 200: 63879 + 321 = 64200
Step 201: 64200 + 321 = 64521
Step 202: 64521 + 321 = 64842
Step 203: 64842 + 321 = 65163
Step 204: 65163 + 321 = 65484
Step 205: 65484 + 321 = 65805
Step 206: 65805 + 321 = 66126
Step 207: 66126 + 321 = 66447
Step 208: 66447 + 321 = 66768
Step 209: 66768 + 321 = 67089
Step 210: 67089 + 321 = 67410
Step 211: 67410 + 321 = 67731
Step 212: 67731 + 321 = 68052
Step 213: 68052 + 321 = 68373
Step 214: 68373 + 321 = 68694
Step 215: 68694 + 321 = 69015
Step 216: 69015 + 321 = 69336
Step 217: 69336 + 321 = 69657
Step 218: 69657 + 321 = 69978
Step 219: 69978 + 321 = 70299
Step 220: 70299 + 321 = 70620
Step 221: 70620 + 321 = 70941
Step 222: 70941 + 321 = 71262
Step 223: 71262 + 321 = 71583
Step 224: 71583 + 321 = 71904
Step 225: 71904 + 321 = 72225
Step 226: 72225 + 321 = 72546
Step 227: 72546 + 321 = 72867
Step 228: 72867 + 321 = 73188
Step 229: 73188 + 321 = 73509
Step 230: 73509 + 321 = 73830
Step 231: 73830 + 321 = 74151
Step 232: 74151 + 321 = 74472
Step 233: 74472 + 321 = 74793
Step 234: 74793 + 321 = 75114
Step 235: 75114 + 321 = 75435
Step 236: 75435 + 321 = 75756
Step 237: 75756 + 321 = 76077
Step 238: 76077 + 321 = 76398
Step 239: 76398 + 321 = 76719
Step 240: 76719 + 321 = 77040
Step 241: 77040 + 321 = 77361
Step 242: 77361 + 321 = 77682
Step 243: 77682 + 321 = 78003
Step 244: 78003 + 321 = 78324
Step 245: 78324 + 321 = 78645
Step 246: 78645 + 321 = 78966
Step 247: 78966 + 321 = 79287
Step 248: 79287 + 321 = 79608
Step 249: 79608 + 321 = 79929
Step 250: 79929 + 321 = 80250
Step 251: 80250 + 321 = 80571
Step 252: 80571 + 321 = 80892
Step 253: 80892 + 321 = 81213
Step 254: 81213 + 321 = 81534
Step 255: 81534 + 321 = 81855
Step 256: 81855 + 321 = 82176
Step 257: 82176 + 321 = 82497
Step 258: 82497 + 321 = 82818
Step 259: 82818 + 321 = 83139
Step 260: 83139 + 321 = 83460
Step 261: 83460 + 321 = 83781
Step 262: 83781 + 321 = 84102
Step 263: 84102 + 321 = 84423
Step 264: 84423 + 321 = 84744
Step 265: 84744 + 321 = 85065
Step 266: 85065 + 321 = 85386
Step 267: 85386 + 321 = 85707
Step 268: 85707 + 321 = 86028
Step 269: 86028 + 321 = 86349
Step 270: 86349 + 321 = 86670
Step 271: 86670 + 321 = 86991
Step 272: 86991 + 321 = 87312
Step 273: 87312 + 321 = 87633
Step 274: 87633 + 321 = 87954
Step 275: 87954 + 321 = 88275
Step 276: 88275 + 321 = 88596
Step 277: 88596 + 321 = 88917
Step 278: 88917 + 321 = 89238
Step 279: 89238 + 321 = 89559
Step 280: 89559 + 321 = 89880
Step 281: 89880 + 321 = 90201
Step 282: 90201 + 321 = 90522
Step 283: 90522 + 321 = 90843
Step 284: 90843 + 321 = 91164
Step 285: 91164 + 321 = 91485
Step 286: 91485 + 321 = 91806
Step 287: 91806 + 321 = 92127
Step 288: 92127 + 321 = 92448
Step 289: 92448 + 321 = 92769
Step 290: 92769 + 321 = 93090
Step 291: 93090 + 321 = 93411
Step 292: 93411 + 321 = 93732
Step 293: 93732 + 321 = 94053
Step 294: 94053 + 321 = 94374
Step 295: 94374 + 321 = 94695
Step 296: 94695 + 321 = 95016
Step 297: 95016 + 321 = 95337
Step 298: 95337 + 321 = 95658
Step 299: 95658 + 321 = 95979
Step 300: 95979 + 321 = 96300
Step 301: 96300 + 321 = 96621
Step 302: 96621 + 321 = 96942
Step 303: 96942 + 321 = 97263
Step 304: 97263 + 321 = 97584
Step 305: 97584 + 321 = 97905
Step 306: 97905 + 321 = 98226
Step 307: 98226 + 321 = 98547
Step 308: 98547 + 321 = 98868
Step 309: 98868 + 321 = 99189
Step 310: 99189 + 321 = 99510
Step 311: 99510 + 321 = 99831
Step 312: 99831 + 321 = 100152
Step 313: 100152 + 321 = 100473
Step 314: 100473 + 321 = 100794
Step 315: 100794 + 321 = 101115
Step 316: 101115 + 321 = 101436
Step 317: 101436 + 321 = 101757
Step 318: 101757 + 321 = 102078
Step 319: 102078 + 321 = 102399
Step 320: 102399 + 321 = 102720
Step 321: 102720 + 321 = 103041
Step 322: 103041 + 321 = 103362
Step 323: 103362 + 321 = 103683
Step 324: 103683 + 321 = 104004
Step 325: 104004 + 321 = 104325
Step 326: 104325 + 321 = 104646
Step 327: 104646 + 321 = 104967
Step 328: 104967 + 321 = 105288
Step 329: 105288 + 321 = 105609
Step 330: 105609 + 321 = 105930
Step 331: 105930 + 321 = 106251
Step 332: 106251 + 321 = 106572
Step 333: 106572 + 321 = 106893
Step 334: 106893 + 321 = 107214
Step 335: 107214 + 321 = 107535
Step 336: 107535 + 321 = 107856
Step 337: 107856 + 321 = 108177
Step 338: 108177 + 321 = 108498
Step 339: 108498 + 321 = 108819
Step 340: 108819 + 321 = 109140
Step 341: 109140 + 321 = 109461
Step 342: 109461 + 321 = 109782
Step 343: 109782 + 321 = 110103
Step 344: 110103 + 321 = 110424
Step 345: 110424 + 321 = 110745
Step 346: 110745 + 321 = 111066
Step 347: 111066 + 321 = 111387
Step 348: 111387 + 321 = 111708
Step 349: 111708 + 321 = 112029
Step 350: 112029 + 321 = 112350
Step 351: 112350 + 321 = 112671
Step 352: 112671 + 321 = 112992
Step 353: 112992 + 321 = 113313
Step 354: 113313 + 321 = 113634
Step 355: 113634 + 321 = 113955
Step 356: 113955 + 321 = 114276
Step 357: 114276 + 321 = 114597
Step 358: 114597 + 321 = 114918
Step 359: 114918 + 321 = 115239
Step 360: 115239 + 321 = 115560
Step 361: 115560 + 321 = 115881
Step 362: 115881 + 321 = 116202
Step 363: 116202 + 321 = 116523
Step 364: 116523 + 321 = 116844
Step 365: 116844 + 321 = 117165
Step 366: 117165 + 321 = 117486
Step 367: 117486 + 321 = 117807
Step 368: 117807 + 321 = 118128
Step 369: 118128 + 321 = 118449
Step 370: 118449 + 321 = 118770
Step 371: 118770 + 321 = 119091
Step 372: 119091 + 321 = 119412
Step 373: 119412 + 321 = 119733
Step 374: 119733 + 321 = 120054
Step 375: 120054 + 321 = 120375
Step 376: 120375 + 321 = 120696
Step 377: 120696 + 321 = 121017
Step 378: 121017 + 321 = 121338
Step 379: 121338 + 321 = 121659
Step 380: 121659 + 321 = 121980
Step 381: 121980 + 321 = 122301

So, 321*381 = 122301