Without delay, let's solve this. We've got 91 and we will be multiplying it by 380, that is, adding 91 to itself 380 times.
Step 1: 0 + 91 = 91
Step 2: 91 + 91 = 182
Step 3: 182 + 91 = 273
Step 4: 273 + 91 = 364
Step 5: 364 + 91 = 455
Step 6: 455 + 91 = 546
Step 7: 546 + 91 = 637
Step 8: 637 + 91 = 728
Step 9: 728 + 91 = 819
Step 10: 819 + 91 = 910
Step 11: 910 + 91 = 1001
Step 12: 1001 + 91 = 1092
Step 13: 1092 + 91 = 1183
Step 14: 1183 + 91 = 1274
Step 15: 1274 + 91 = 1365
Step 16: 1365 + 91 = 1456
Step 17: 1456 + 91 = 1547
Step 18: 1547 + 91 = 1638
Step 19: 1638 + 91 = 1729
Step 20: 1729 + 91 = 1820
Step 21: 1820 + 91 = 1911
Step 22: 1911 + 91 = 2002
Step 23: 2002 + 91 = 2093
Step 24: 2093 + 91 = 2184
Step 25: 2184 + 91 = 2275
Step 26: 2275 + 91 = 2366
Step 27: 2366 + 91 = 2457
Step 28: 2457 + 91 = 2548
Step 29: 2548 + 91 = 2639
Step 30: 2639 + 91 = 2730
Step 31: 2730 + 91 = 2821
Step 32: 2821 + 91 = 2912
Step 33: 2912 + 91 = 3003
Step 34: 3003 + 91 = 3094
Step 35: 3094 + 91 = 3185
Step 36: 3185 + 91 = 3276
Step 37: 3276 + 91 = 3367
Step 38: 3367 + 91 = 3458
Step 39: 3458 + 91 = 3549
Step 40: 3549 + 91 = 3640
Step 41: 3640 + 91 = 3731
Step 42: 3731 + 91 = 3822
Step 43: 3822 + 91 = 3913
Step 44: 3913 + 91 = 4004
Step 45: 4004 + 91 = 4095
Step 46: 4095 + 91 = 4186
Step 47: 4186 + 91 = 4277
Step 48: 4277 + 91 = 4368
Step 49: 4368 + 91 = 4459
Step 50: 4459 + 91 = 4550
Step 51: 4550 + 91 = 4641
Step 52: 4641 + 91 = 4732
Step 53: 4732 + 91 = 4823
Step 54: 4823 + 91 = 4914
Step 55: 4914 + 91 = 5005
Step 56: 5005 + 91 = 5096
Step 57: 5096 + 91 = 5187
Step 58: 5187 + 91 = 5278
Step 59: 5278 + 91 = 5369
Step 60: 5369 + 91 = 5460
Step 61: 5460 + 91 = 5551
Step 62: 5551 + 91 = 5642
Step 63: 5642 + 91 = 5733
Step 64: 5733 + 91 = 5824
Step 65: 5824 + 91 = 5915
Step 66: 5915 + 91 = 6006
Step 67: 6006 + 91 = 6097
Step 68: 6097 + 91 = 6188
Step 69: 6188 + 91 = 6279
Step 70: 6279 + 91 = 6370
Step 71: 6370 + 91 = 6461
Step 72: 6461 + 91 = 6552
Step 73: 6552 + 91 = 6643
Step 74: 6643 + 91 = 6734
Step 75: 6734 + 91 = 6825
Step 76: 6825 + 91 = 6916
Step 77: 6916 + 91 = 7007
Step 78: 7007 + 91 = 7098
Step 79: 7098 + 91 = 7189
Step 80: 7189 + 91 = 7280
Step 81: 7280 + 91 = 7371
Step 82: 7371 + 91 = 7462
Step 83: 7462 + 91 = 7553
Step 84: 7553 + 91 = 7644
Step 85: 7644 + 91 = 7735
Step 86: 7735 + 91 = 7826
Step 87: 7826 + 91 = 7917
Step 88: 7917 + 91 = 8008
Step 89: 8008 + 91 = 8099
Step 90: 8099 + 91 = 8190
Step 91: 8190 + 91 = 8281
Step 92: 8281 + 91 = 8372
Step 93: 8372 + 91 = 8463
Step 94: 8463 + 91 = 8554
Step 95: 8554 + 91 = 8645
Step 96: 8645 + 91 = 8736
Step 97: 8736 + 91 = 8827
Step 98: 8827 + 91 = 8918
Step 99: 8918 + 91 = 9009
Step 100: 9009 + 91 = 9100
Step 101: 9100 + 91 = 9191
Step 102: 9191 + 91 = 9282
Step 103: 9282 + 91 = 9373
Step 104: 9373 + 91 = 9464
Step 105: 9464 + 91 = 9555
Step 106: 9555 + 91 = 9646
Step 107: 9646 + 91 = 9737
Step 108: 9737 + 91 = 9828
Step 109: 9828 + 91 = 9919
Step 110: 9919 + 91 = 10010
Step 111: 10010 + 91 = 10101
Step 112: 10101 + 91 = 10192
Step 113: 10192 + 91 = 10283
Step 114: 10283 + 91 = 10374
Step 115: 10374 + 91 = 10465
Step 116: 10465 + 91 = 10556
Step 117: 10556 + 91 = 10647
Step 118: 10647 + 91 = 10738
Step 119: 10738 + 91 = 10829
Step 120: 10829 + 91 = 10920
Step 121: 10920 + 91 = 11011
Step 122: 11011 + 91 = 11102
Step 123: 11102 + 91 = 11193
Step 124: 11193 + 91 = 11284
Step 125: 11284 + 91 = 11375
Step 126: 11375 + 91 = 11466
Step 127: 11466 + 91 = 11557
Step 128: 11557 + 91 = 11648
Step 129: 11648 + 91 = 11739
Step 130: 11739 + 91 = 11830
Step 131: 11830 + 91 = 11921
Step 132: 11921 + 91 = 12012
Step 133: 12012 + 91 = 12103
Step 134: 12103 + 91 = 12194
Step 135: 12194 + 91 = 12285
Step 136: 12285 + 91 = 12376
Step 137: 12376 + 91 = 12467
Step 138: 12467 + 91 = 12558
Step 139: 12558 + 91 = 12649
Step 140: 12649 + 91 = 12740
Step 141: 12740 + 91 = 12831
Step 142: 12831 + 91 = 12922
Step 143: 12922 + 91 = 13013
Step 144: 13013 + 91 = 13104
Step 145: 13104 + 91 = 13195
Step 146: 13195 + 91 = 13286
Step 147: 13286 + 91 = 13377
Step 148: 13377 + 91 = 13468
Step 149: 13468 + 91 = 13559
Step 150: 13559 + 91 = 13650
Step 151: 13650 + 91 = 13741
Step 152: 13741 + 91 = 13832
Step 153: 13832 + 91 = 13923
Step 154: 13923 + 91 = 14014
Step 155: 14014 + 91 = 14105
Step 156: 14105 + 91 = 14196
Step 157: 14196 + 91 = 14287
Step 158: 14287 + 91 = 14378
Step 159: 14378 + 91 = 14469
Step 160: 14469 + 91 = 14560
Step 161: 14560 + 91 = 14651
Step 162: 14651 + 91 = 14742
Step 163: 14742 + 91 = 14833
Step 164: 14833 + 91 = 14924
Step 165: 14924 + 91 = 15015
Step 166: 15015 + 91 = 15106
Step 167: 15106 + 91 = 15197
Step 168: 15197 + 91 = 15288
Step 169: 15288 + 91 = 15379
Step 170: 15379 + 91 = 15470
Step 171: 15470 + 91 = 15561
Step 172: 15561 + 91 = 15652
Step 173: 15652 + 91 = 15743
Step 174: 15743 + 91 = 15834
Step 175: 15834 + 91 = 15925
Step 176: 15925 + 91 = 16016
Step 177: 16016 + 91 = 16107
Step 178: 16107 + 91 = 16198
Step 179: 16198 + 91 = 16289
Step 180: 16289 + 91 = 16380
Step 181: 16380 + 91 = 16471
Step 182: 16471 + 91 = 16562
Step 183: 16562 + 91 = 16653
Step 184: 16653 + 91 = 16744
Step 185: 16744 + 91 = 16835
Step 186: 16835 + 91 = 16926
Step 187: 16926 + 91 = 17017
Step 188: 17017 + 91 = 17108
Step 189: 17108 + 91 = 17199
Step 190: 17199 + 91 = 17290
Step 191: 17290 + 91 = 17381
Step 192: 17381 + 91 = 17472
Step 193: 17472 + 91 = 17563
Step 194: 17563 + 91 = 17654
Step 195: 17654 + 91 = 17745
Step 196: 17745 + 91 = 17836
Step 197: 17836 + 91 = 17927
Step 198: 17927 + 91 = 18018
Step 199: 18018 + 91 = 18109
Step 200: 18109 + 91 = 18200
Step 201: 18200 + 91 = 18291
Step 202: 18291 + 91 = 18382
Step 203: 18382 + 91 = 18473
Step 204: 18473 + 91 = 18564
Step 205: 18564 + 91 = 18655
Step 206: 18655 + 91 = 18746
Step 207: 18746 + 91 = 18837
Step 208: 18837 + 91 = 18928
Step 209: 18928 + 91 = 19019
Step 210: 19019 + 91 = 19110
Step 211: 19110 + 91 = 19201
Step 212: 19201 + 91 = 19292
Step 213: 19292 + 91 = 19383
Step 214: 19383 + 91 = 19474
Step 215: 19474 + 91 = 19565
Step 216: 19565 + 91 = 19656
Step 217: 19656 + 91 = 19747
Step 218: 19747 + 91 = 19838
Step 219: 19838 + 91 = 19929
Step 220: 19929 + 91 = 20020
Step 221: 20020 + 91 = 20111
Step 222: 20111 + 91 = 20202
Step 223: 20202 + 91 = 20293
Step 224: 20293 + 91 = 20384
Step 225: 20384 + 91 = 20475
Step 226: 20475 + 91 = 20566
Step 227: 20566 + 91 = 20657
Step 228: 20657 + 91 = 20748
Step 229: 20748 + 91 = 20839
Step 230: 20839 + 91 = 20930
Step 231: 20930 + 91 = 21021
Step 232: 21021 + 91 = 21112
Step 233: 21112 + 91 = 21203
Step 234: 21203 + 91 = 21294
Step 235: 21294 + 91 = 21385
Step 236: 21385 + 91 = 21476
Step 237: 21476 + 91 = 21567
Step 238: 21567 + 91 = 21658
Step 239: 21658 + 91 = 21749
Step 240: 21749 + 91 = 21840
Step 241: 21840 + 91 = 21931
Step 242: 21931 + 91 = 22022
Step 243: 22022 + 91 = 22113
Step 244: 22113 + 91 = 22204
Step 245: 22204 + 91 = 22295
Step 246: 22295 + 91 = 22386
Step 247: 22386 + 91 = 22477
Step 248: 22477 + 91 = 22568
Step 249: 22568 + 91 = 22659
Step 250: 22659 + 91 = 22750
Step 251: 22750 + 91 = 22841
Step 252: 22841 + 91 = 22932
Step 253: 22932 + 91 = 23023
Step 254: 23023 + 91 = 23114
Step 255: 23114 + 91 = 23205
Step 256: 23205 + 91 = 23296
Step 257: 23296 + 91 = 23387
Step 258: 23387 + 91 = 23478
Step 259: 23478 + 91 = 23569
Step 260: 23569 + 91 = 23660
Step 261: 23660 + 91 = 23751
Step 262: 23751 + 91 = 23842
Step 263: 23842 + 91 = 23933
Step 264: 23933 + 91 = 24024
Step 265: 24024 + 91 = 24115
Step 266: 24115 + 91 = 24206
Step 267: 24206 + 91 = 24297
Step 268: 24297 + 91 = 24388
Step 269: 24388 + 91 = 24479
Step 270: 24479 + 91 = 24570
Step 271: 24570 + 91 = 24661
Step 272: 24661 + 91 = 24752
Step 273: 24752 + 91 = 24843
Step 274: 24843 + 91 = 24934
Step 275: 24934 + 91 = 25025
Step 276: 25025 + 91 = 25116
Step 277: 25116 + 91 = 25207
Step 278: 25207 + 91 = 25298
Step 279: 25298 + 91 = 25389
Step 280: 25389 + 91 = 25480
Step 281: 25480 + 91 = 25571
Step 282: 25571 + 91 = 25662
Step 283: 25662 + 91 = 25753
Step 284: 25753 + 91 = 25844
Step 285: 25844 + 91 = 25935
Step 286: 25935 + 91 = 26026
Step 287: 26026 + 91 = 26117
Step 288: 26117 + 91 = 26208
Step 289: 26208 + 91 = 26299
Step 290: 26299 + 91 = 26390
Step 291: 26390 + 91 = 26481
Step 292: 26481 + 91 = 26572
Step 293: 26572 + 91 = 26663
Step 294: 26663 + 91 = 26754
Step 295: 26754 + 91 = 26845
Step 296: 26845 + 91 = 26936
Step 297: 26936 + 91 = 27027
Step 298: 27027 + 91 = 27118
Step 299: 27118 + 91 = 27209
Step 300: 27209 + 91 = 27300
Step 301: 27300 + 91 = 27391
Step 302: 27391 + 91 = 27482
Step 303: 27482 + 91 = 27573
Step 304: 27573 + 91 = 27664
Step 305: 27664 + 91 = 27755
Step 306: 27755 + 91 = 27846
Step 307: 27846 + 91 = 27937
Step 308: 27937 + 91 = 28028
Step 309: 28028 + 91 = 28119
Step 310: 28119 + 91 = 28210
Step 311: 28210 + 91 = 28301
Step 312: 28301 + 91 = 28392
Step 313: 28392 + 91 = 28483
Step 314: 28483 + 91 = 28574
Step 315: 28574 + 91 = 28665
Step 316: 28665 + 91 = 28756
Step 317: 28756 + 91 = 28847
Step 318: 28847 + 91 = 28938
Step 319: 28938 + 91 = 29029
Step 320: 29029 + 91 = 29120
Step 321: 29120 + 91 = 29211
Step 322: 29211 + 91 = 29302
Step 323: 29302 + 91 = 29393
Step 324: 29393 + 91 = 29484
Step 325: 29484 + 91 = 29575
Step 326: 29575 + 91 = 29666
Step 327: 29666 + 91 = 29757
Step 328: 29757 + 91 = 29848
Step 329: 29848 + 91 = 29939
Step 330: 29939 + 91 = 30030
Step 331: 30030 + 91 = 30121
Step 332: 30121 + 91 = 30212
Step 333: 30212 + 91 = 30303
Step 334: 30303 + 91 = 30394
Step 335: 30394 + 91 = 30485
Step 336: 30485 + 91 = 30576
Step 337: 30576 + 91 = 30667
Step 338: 30667 + 91 = 30758
Step 339: 30758 + 91 = 30849
Step 340: 30849 + 91 = 30940
Step 341: 30940 + 91 = 31031
Step 342: 31031 + 91 = 31122
Step 343: 31122 + 91 = 31213
Step 344: 31213 + 91 = 31304
Step 345: 31304 + 91 = 31395
Step 346: 31395 + 91 = 31486
Step 347: 31486 + 91 = 31577
Step 348: 31577 + 91 = 31668
Step 349: 31668 + 91 = 31759
Step 350: 31759 + 91 = 31850
Step 351: 31850 + 91 = 31941
Step 352: 31941 + 91 = 32032
Step 353: 32032 + 91 = 32123
Step 354: 32123 + 91 = 32214
Step 355: 32214 + 91 = 32305
Step 356: 32305 + 91 = 32396
Step 357: 32396 + 91 = 32487
Step 358: 32487 + 91 = 32578
Step 359: 32578 + 91 = 32669
Step 360: 32669 + 91 = 32760
Step 361: 32760 + 91 = 32851
Step 362: 32851 + 91 = 32942
Step 363: 32942 + 91 = 33033
Step 364: 33033 + 91 = 33124
Step 365: 33124 + 91 = 33215
Step 366: 33215 + 91 = 33306
Step 367: 33306 + 91 = 33397
Step 368: 33397 + 91 = 33488
Step 369: 33488 + 91 = 33579
Step 370: 33579 + 91 = 33670
Step 371: 33670 + 91 = 33761
Step 372: 33761 + 91 = 33852
Step 373: 33852 + 91 = 33943
Step 374: 33943 + 91 = 34034
Step 375: 34034 + 91 = 34125
Step 376: 34125 + 91 = 34216
Step 377: 34216 + 91 = 34307
Step 378: 34307 + 91 = 34398
Step 379: 34398 + 91 = 34489
Step 380: 34489 + 91 = 34580

So, 91*380 = 34580