Sure thing, let's get straight to it. We start with 543 and we're going to multiply it by 344, which means adding 543 to itself 344 times.
Step 1: 0 + 543 = 543
Step 2: 543 + 543 = 1086
Step 3: 1086 + 543 = 1629
Step 4: 1629 + 543 = 2172
Step 5: 2172 + 543 = 2715
Step 6: 2715 + 543 = 3258
Step 7: 3258 + 543 = 3801
Step 8: 3801 + 543 = 4344
Step 9: 4344 + 543 = 4887
Step 10: 4887 + 543 = 5430
Step 11: 5430 + 543 = 5973
Step 12: 5973 + 543 = 6516
Step 13: 6516 + 543 = 7059
Step 14: 7059 + 543 = 7602
Step 15: 7602 + 543 = 8145
Step 16: 8145 + 543 = 8688
Step 17: 8688 + 543 = 9231
Step 18: 9231 + 543 = 9774
Step 19: 9774 + 543 = 10317
Step 20: 10317 + 543 = 10860
Step 21: 10860 + 543 = 11403
Step 22: 11403 + 543 = 11946
Step 23: 11946 + 543 = 12489
Step 24: 12489 + 543 = 13032
Step 25: 13032 + 543 = 13575
Step 26: 13575 + 543 = 14118
Step 27: 14118 + 543 = 14661
Step 28: 14661 + 543 = 15204
Step 29: 15204 + 543 = 15747
Step 30: 15747 + 543 = 16290
Step 31: 16290 + 543 = 16833
Step 32: 16833 + 543 = 17376
Step 33: 17376 + 543 = 17919
Step 34: 17919 + 543 = 18462
Step 35: 18462 + 543 = 19005
Step 36: 19005 + 543 = 19548
Step 37: 19548 + 543 = 20091
Step 38: 20091 + 543 = 20634
Step 39: 20634 + 543 = 21177
Step 40: 21177 + 543 = 21720
Step 41: 21720 + 543 = 22263
Step 42: 22263 + 543 = 22806
Step 43: 22806 + 543 = 23349
Step 44: 23349 + 543 = 23892
Step 45: 23892 + 543 = 24435
Step 46: 24435 + 543 = 24978
Step 47: 24978 + 543 = 25521
Step 48: 25521 + 543 = 26064
Step 49: 26064 + 543 = 26607
Step 50: 26607 + 543 = 27150
Step 51: 27150 + 543 = 27693
Step 52: 27693 + 543 = 28236
Step 53: 28236 + 543 = 28779
Step 54: 28779 + 543 = 29322
Step 55: 29322 + 543 = 29865
Step 56: 29865 + 543 = 30408
Step 57: 30408 + 543 = 30951
Step 58: 30951 + 543 = 31494
Step 59: 31494 + 543 = 32037
Step 60: 32037 + 543 = 32580
Step 61: 32580 + 543 = 33123
Step 62: 33123 + 543 = 33666
Step 63: 33666 + 543 = 34209
Step 64: 34209 + 543 = 34752
Step 65: 34752 + 543 = 35295
Step 66: 35295 + 543 = 35838
Step 67: 35838 + 543 = 36381
Step 68: 36381 + 543 = 36924
Step 69: 36924 + 543 = 37467
Step 70: 37467 + 543 = 38010
Step 71: 38010 + 543 = 38553
Step 72: 38553 + 543 = 39096
Step 73: 39096 + 543 = 39639
Step 74: 39639 + 543 = 40182
Step 75: 40182 + 543 = 40725
Step 76: 40725 + 543 = 41268
Step 77: 41268 + 543 = 41811
Step 78: 41811 + 543 = 42354
Step 79: 42354 + 543 = 42897
Step 80: 42897 + 543 = 43440
Step 81: 43440 + 543 = 43983
Step 82: 43983 + 543 = 44526
Step 83: 44526 + 543 = 45069
Step 84: 45069 + 543 = 45612
Step 85: 45612 + 543 = 46155
Step 86: 46155 + 543 = 46698
Step 87: 46698 + 543 = 47241
Step 88: 47241 + 543 = 47784
Step 89: 47784 + 543 = 48327
Step 90: 48327 + 543 = 48870
Step 91: 48870 + 543 = 49413
Step 92: 49413 + 543 = 49956
Step 93: 49956 + 543 = 50499
Step 94: 50499 + 543 = 51042
Step 95: 51042 + 543 = 51585
Step 96: 51585 + 543 = 52128
Step 97: 52128 + 543 = 52671
Step 98: 52671 + 543 = 53214
Step 99: 53214 + 543 = 53757
Step 100: 53757 + 543 = 54300
Step 101: 54300 + 543 = 54843
Step 102: 54843 + 543 = 55386
Step 103: 55386 + 543 = 55929
Step 104: 55929 + 543 = 56472
Step 105: 56472 + 543 = 57015
Step 106: 57015 + 543 = 57558
Step 107: 57558 + 543 = 58101
Step 108: 58101 + 543 = 58644
Step 109: 58644 + 543 = 59187
Step 110: 59187 + 543 = 59730
Step 111: 59730 + 543 = 60273
Step 112: 60273 + 543 = 60816
Step 113: 60816 + 543 = 61359
Step 114: 61359 + 543 = 61902
Step 115: 61902 + 543 = 62445
Step 116: 62445 + 543 = 62988
Step 117: 62988 + 543 = 63531
Step 118: 63531 + 543 = 64074
Step 119: 64074 + 543 = 64617
Step 120: 64617 + 543 = 65160
Step 121: 65160 + 543 = 65703
Step 122: 65703 + 543 = 66246
Step 123: 66246 + 543 = 66789
Step 124: 66789 + 543 = 67332
Step 125: 67332 + 543 = 67875
Step 126: 67875 + 543 = 68418
Step 127: 68418 + 543 = 68961
Step 128: 68961 + 543 = 69504
Step 129: 69504 + 543 = 70047
Step 130: 70047 + 543 = 70590
Step 131: 70590 + 543 = 71133
Step 132: 71133 + 543 = 71676
Step 133: 71676 + 543 = 72219
Step 134: 72219 + 543 = 72762
Step 135: 72762 + 543 = 73305
Step 136: 73305 + 543 = 73848
Step 137: 73848 + 543 = 74391
Step 138: 74391 + 543 = 74934
Step 139: 74934 + 543 = 75477
Step 140: 75477 + 543 = 76020
Step 141: 76020 + 543 = 76563
Step 142: 76563 + 543 = 77106
Step 143: 77106 + 543 = 77649
Step 144: 77649 + 543 = 78192
Step 145: 78192 + 543 = 78735
Step 146: 78735 + 543 = 79278
Step 147: 79278 + 543 = 79821
Step 148: 79821 + 543 = 80364
Step 149: 80364 + 543 = 80907
Step 150: 80907 + 543 = 81450
Step 151: 81450 + 543 = 81993
Step 152: 81993 + 543 = 82536
Step 153: 82536 + 543 = 83079
Step 154: 83079 + 543 = 83622
Step 155: 83622 + 543 = 84165
Step 156: 84165 + 543 = 84708
Step 157: 84708 + 543 = 85251
Step 158: 85251 + 543 = 85794
Step 159: 85794 + 543 = 86337
Step 160: 86337 + 543 = 86880
Step 161: 86880 + 543 = 87423
Step 162: 87423 + 543 = 87966
Step 163: 87966 + 543 = 88509
Step 164: 88509 + 543 = 89052
Step 165: 89052 + 543 = 89595
Step 166: 89595 + 543 = 90138
Step 167: 90138 + 543 = 90681
Step 168: 90681 + 543 = 91224
Step 169: 91224 + 543 = 91767
Step 170: 91767 + 543 = 92310
Step 171: 92310 + 543 = 92853
Step 172: 92853 + 543 = 93396
Step 173: 93396 + 543 = 93939
Step 174: 93939 + 543 = 94482
Step 175: 94482 + 543 = 95025
Step 176: 95025 + 543 = 95568
Step 177: 95568 + 543 = 96111
Step 178: 96111 + 543 = 96654
Step 179: 96654 + 543 = 97197
Step 180: 97197 + 543 = 97740
Step 181: 97740 + 543 = 98283
Step 182: 98283 + 543 = 98826
Step 183: 98826 + 543 = 99369
Step 184: 99369 + 543 = 99912
Step 185: 99912 + 543 = 100455
Step 186: 100455 + 543 = 100998
Step 187: 100998 + 543 = 101541
Step 188: 101541 + 543 = 102084
Step 189: 102084 + 543 = 102627
Step 190: 102627 + 543 = 103170
Step 191: 103170 + 543 = 103713
Step 192: 103713 + 543 = 104256
Step 193: 104256 + 543 = 104799
Step 194: 104799 + 543 = 105342
Step 195: 105342 + 543 = 105885
Step 196: 105885 + 543 = 106428
Step 197: 106428 + 543 = 106971
Step 198: 106971 + 543 = 107514
Step 199: 107514 + 543 = 108057
Step 200: 108057 + 543 = 108600
Step 201: 108600 + 543 = 109143
Step 202: 109143 + 543 = 109686
Step 203: 109686 + 543 = 110229
Step 204: 110229 + 543 = 110772
Step 205: 110772 + 543 = 111315
Step 206: 111315 + 543 = 111858
Step 207: 111858 + 543 = 112401
Step 208: 112401 + 543 = 112944
Step 209: 112944 + 543 = 113487
Step 210: 113487 + 543 = 114030
Step 211: 114030 + 543 = 114573
Step 212: 114573 + 543 = 115116
Step 213: 115116 + 543 = 115659
Step 214: 115659 + 543 = 116202
Step 215: 116202 + 543 = 116745
Step 216: 116745 + 543 = 117288
Step 217: 117288 + 543 = 117831
Step 218: 117831 + 543 = 118374
Step 219: 118374 + 543 = 118917
Step 220: 118917 + 543 = 119460
Step 221: 119460 + 543 = 120003
Step 222: 120003 + 543 = 120546
Step 223: 120546 + 543 = 121089
Step 224: 121089 + 543 = 121632
Step 225: 121632 + 543 = 122175
Step 226: 122175 + 543 = 122718
Step 227: 122718 + 543 = 123261
Step 228: 123261 + 543 = 123804
Step 229: 123804 + 543 = 124347
Step 230: 124347 + 543 = 124890
Step 231: 124890 + 543 = 125433
Step 232: 125433 + 543 = 125976
Step 233: 125976 + 543 = 126519
Step 234: 126519 + 543 = 127062
Step 235: 127062 + 543 = 127605
Step 236: 127605 + 543 = 128148
Step 237: 128148 + 543 = 128691
Step 238: 128691 + 543 = 129234
Step 239: 129234 + 543 = 129777
Step 240: 129777 + 543 = 130320
Step 241: 130320 + 543 = 130863
Step 242: 130863 + 543 = 131406
Step 243: 131406 + 543 = 131949
Step 244: 131949 + 543 = 132492
Step 245: 132492 + 543 = 133035
Step 246: 133035 + 543 = 133578
Step 247: 133578 + 543 = 134121
Step 248: 134121 + 543 = 134664
Step 249: 134664 + 543 = 135207
Step 250: 135207 + 543 = 135750
Step 251: 135750 + 543 = 136293
Step 252: 136293 + 543 = 136836
Step 253: 136836 + 543 = 137379
Step 254: 137379 + 543 = 137922
Step 255: 137922 + 543 = 138465
Step 256: 138465 + 543 = 139008
Step 257: 139008 + 543 = 139551
Step 258: 139551 + 543 = 140094
Step 259: 140094 + 543 = 140637
Step 260: 140637 + 543 = 141180
Step 261: 141180 + 543 = 141723
Step 262: 141723 + 543 = 142266
Step 263: 142266 + 543 = 142809
Step 264: 142809 + 543 = 143352
Step 265: 143352 + 543 = 143895
Step 266: 143895 + 543 = 144438
Step 267: 144438 + 543 = 144981
Step 268: 144981 + 543 = 145524
Step 269: 145524 + 543 = 146067
Step 270: 146067 + 543 = 146610
Step 271: 146610 + 543 = 147153
Step 272: 147153 + 543 = 147696
Step 273: 147696 + 543 = 148239
Step 274: 148239 + 543 = 148782
Step 275: 148782 + 543 = 149325
Step 276: 149325 + 543 = 149868
Step 277: 149868 + 543 = 150411
Step 278: 150411 + 543 = 150954
Step 279: 150954 + 543 = 151497
Step 280: 151497 + 543 = 152040
Step 281: 152040 + 543 = 152583
Step 282: 152583 + 543 = 153126
Step 283: 153126 + 543 = 153669
Step 284: 153669 + 543 = 154212
Step 285: 154212 + 543 = 154755
Step 286: 154755 + 543 = 155298
Step 287: 155298 + 543 = 155841
Step 288: 155841 + 543 = 156384
Step 289: 156384 + 543 = 156927
Step 290: 156927 + 543 = 157470
Step 291: 157470 + 543 = 158013
Step 292: 158013 + 543 = 158556
Step 293: 158556 + 543 = 159099
Step 294: 159099 + 543 = 159642
Step 295: 159642 + 543 = 160185
Step 296: 160185 + 543 = 160728
Step 297: 160728 + 543 = 161271
Step 298: 161271 + 543 = 161814
Step 299: 161814 + 543 = 162357
Step 300: 162357 + 543 = 162900
Step 301: 162900 + 543 = 163443
Step 302: 163443 + 543 = 163986
Step 303: 163986 + 543 = 164529
Step 304: 164529 + 543 = 165072
Step 305: 165072 + 543 = 165615
Step 306: 165615 + 543 = 166158
Step 307: 166158 + 543 = 166701
Step 308: 166701 + 543 = 167244
Step 309: 167244 + 543 = 167787
Step 310: 167787 + 543 = 168330
Step 311: 168330 + 543 = 168873
Step 312: 168873 + 543 = 169416
Step 313: 169416 + 543 = 169959
Step 314: 169959 + 543 = 170502
Step 315: 170502 + 543 = 171045
Step 316: 171045 + 543 = 171588
Step 317: 171588 + 543 = 172131
Step 318: 172131 + 543 = 172674
Step 319: 172674 + 543 = 173217
Step 320: 173217 + 543 = 173760
Step 321: 173760 + 543 = 174303
Step 322: 174303 + 543 = 174846
Step 323: 174846 + 543 = 175389
Step 324: 175389 + 543 = 175932
Step 325: 175932 + 543 = 176475
Step 326: 176475 + 543 = 177018
Step 327: 177018 + 543 = 177561
Step 328: 177561 + 543 = 178104
Step 329: 178104 + 543 = 178647
Step 330: 178647 + 543 = 179190
Step 331: 179190 + 543 = 179733
Step 332: 179733 + 543 = 180276
Step 333: 180276 + 543 = 180819
Step 334: 180819 + 543 = 181362
Step 335: 181362 + 543 = 181905
Step 336: 181905 + 543 = 182448
Step 337: 182448 + 543 = 182991
Step 338: 182991 + 543 = 183534
Step 339: 183534 + 543 = 184077
Step 340: 184077 + 543 = 184620
Step 341: 184620 + 543 = 185163
Step 342: 185163 + 543 = 185706
Step 343: 185706 + 543 = 186249
Step 344: 186249 + 543 = 186792

So, 543*344 = 186792