OK, let's crack this. We're given 927 and our task is to multiply it by 405. Essentially, we'll be adding 927 to itself 405 times.
Step 1: 0 + 927 = 927
Step 2: 927 + 927 = 1854
Step 3: 1854 + 927 = 2781
Step 4: 2781 + 927 = 3708
Step 5: 3708 + 927 = 4635
Step 6: 4635 + 927 = 5562
Step 7: 5562 + 927 = 6489
Step 8: 6489 + 927 = 7416
Step 9: 7416 + 927 = 8343
Step 10: 8343 + 927 = 9270
Step 11: 9270 + 927 = 10197
Step 12: 10197 + 927 = 11124
Step 13: 11124 + 927 = 12051
Step 14: 12051 + 927 = 12978
Step 15: 12978 + 927 = 13905
Step 16: 13905 + 927 = 14832
Step 17: 14832 + 927 = 15759
Step 18: 15759 + 927 = 16686
Step 19: 16686 + 927 = 17613
Step 20: 17613 + 927 = 18540
Step 21: 18540 + 927 = 19467
Step 22: 19467 + 927 = 20394
Step 23: 20394 + 927 = 21321
Step 24: 21321 + 927 = 22248
Step 25: 22248 + 927 = 23175
Step 26: 23175 + 927 = 24102
Step 27: 24102 + 927 = 25029
Step 28: 25029 + 927 = 25956
Step 29: 25956 + 927 = 26883
Step 30: 26883 + 927 = 27810
Step 31: 27810 + 927 = 28737
Step 32: 28737 + 927 = 29664
Step 33: 29664 + 927 = 30591
Step 34: 30591 + 927 = 31518
Step 35: 31518 + 927 = 32445
Step 36: 32445 + 927 = 33372
Step 37: 33372 + 927 = 34299
Step 38: 34299 + 927 = 35226
Step 39: 35226 + 927 = 36153
Step 40: 36153 + 927 = 37080
Step 41: 37080 + 927 = 38007
Step 42: 38007 + 927 = 38934
Step 43: 38934 + 927 = 39861
Step 44: 39861 + 927 = 40788
Step 45: 40788 + 927 = 41715
Step 46: 41715 + 927 = 42642
Step 47: 42642 + 927 = 43569
Step 48: 43569 + 927 = 44496
Step 49: 44496 + 927 = 45423
Step 50: 45423 + 927 = 46350
Step 51: 46350 + 927 = 47277
Step 52: 47277 + 927 = 48204
Step 53: 48204 + 927 = 49131
Step 54: 49131 + 927 = 50058
Step 55: 50058 + 927 = 50985
Step 56: 50985 + 927 = 51912
Step 57: 51912 + 927 = 52839
Step 58: 52839 + 927 = 53766
Step 59: 53766 + 927 = 54693
Step 60: 54693 + 927 = 55620
Step 61: 55620 + 927 = 56547
Step 62: 56547 + 927 = 57474
Step 63: 57474 + 927 = 58401
Step 64: 58401 + 927 = 59328
Step 65: 59328 + 927 = 60255
Step 66: 60255 + 927 = 61182
Step 67: 61182 + 927 = 62109
Step 68: 62109 + 927 = 63036
Step 69: 63036 + 927 = 63963
Step 70: 63963 + 927 = 64890
Step 71: 64890 + 927 = 65817
Step 72: 65817 + 927 = 66744
Step 73: 66744 + 927 = 67671
Step 74: 67671 + 927 = 68598
Step 75: 68598 + 927 = 69525
Step 76: 69525 + 927 = 70452
Step 77: 70452 + 927 = 71379
Step 78: 71379 + 927 = 72306
Step 79: 72306 + 927 = 73233
Step 80: 73233 + 927 = 74160
Step 81: 74160 + 927 = 75087
Step 82: 75087 + 927 = 76014
Step 83: 76014 + 927 = 76941
Step 84: 76941 + 927 = 77868
Step 85: 77868 + 927 = 78795
Step 86: 78795 + 927 = 79722
Step 87: 79722 + 927 = 80649
Step 88: 80649 + 927 = 81576
Step 89: 81576 + 927 = 82503
Step 90: 82503 + 927 = 83430
Step 91: 83430 + 927 = 84357
Step 92: 84357 + 927 = 85284
Step 93: 85284 + 927 = 86211
Step 94: 86211 + 927 = 87138
Step 95: 87138 + 927 = 88065
Step 96: 88065 + 927 = 88992
Step 97: 88992 + 927 = 89919
Step 98: 89919 + 927 = 90846
Step 99: 90846 + 927 = 91773
Step 100: 91773 + 927 = 92700
Step 101: 92700 + 927 = 93627
Step 102: 93627 + 927 = 94554
Step 103: 94554 + 927 = 95481
Step 104: 95481 + 927 = 96408
Step 105: 96408 + 927 = 97335
Step 106: 97335 + 927 = 98262
Step 107: 98262 + 927 = 99189
Step 108: 99189 + 927 = 100116
Step 109: 100116 + 927 = 101043
Step 110: 101043 + 927 = 101970
Step 111: 101970 + 927 = 102897
Step 112: 102897 + 927 = 103824
Step 113: 103824 + 927 = 104751
Step 114: 104751 + 927 = 105678
Step 115: 105678 + 927 = 106605
Step 116: 106605 + 927 = 107532
Step 117: 107532 + 927 = 108459
Step 118: 108459 + 927 = 109386
Step 119: 109386 + 927 = 110313
Step 120: 110313 + 927 = 111240
Step 121: 111240 + 927 = 112167
Step 122: 112167 + 927 = 113094
Step 123: 113094 + 927 = 114021
Step 124: 114021 + 927 = 114948
Step 125: 114948 + 927 = 115875
Step 126: 115875 + 927 = 116802
Step 127: 116802 + 927 = 117729
Step 128: 117729 + 927 = 118656
Step 129: 118656 + 927 = 119583
Step 130: 119583 + 927 = 120510
Step 131: 120510 + 927 = 121437
Step 132: 121437 + 927 = 122364
Step 133: 122364 + 927 = 123291
Step 134: 123291 + 927 = 124218
Step 135: 124218 + 927 = 125145
Step 136: 125145 + 927 = 126072
Step 137: 126072 + 927 = 126999
Step 138: 126999 + 927 = 127926
Step 139: 127926 + 927 = 128853
Step 140: 128853 + 927 = 129780
Step 141: 129780 + 927 = 130707
Step 142: 130707 + 927 = 131634
Step 143: 131634 + 927 = 132561
Step 144: 132561 + 927 = 133488
Step 145: 133488 + 927 = 134415
Step 146: 134415 + 927 = 135342
Step 147: 135342 + 927 = 136269
Step 148: 136269 + 927 = 137196
Step 149: 137196 + 927 = 138123
Step 150: 138123 + 927 = 139050
Step 151: 139050 + 927 = 139977
Step 152: 139977 + 927 = 140904
Step 153: 140904 + 927 = 141831
Step 154: 141831 + 927 = 142758
Step 155: 142758 + 927 = 143685
Step 156: 143685 + 927 = 144612
Step 157: 144612 + 927 = 145539
Step 158: 145539 + 927 = 146466
Step 159: 146466 + 927 = 147393
Step 160: 147393 + 927 = 148320
Step 161: 148320 + 927 = 149247
Step 162: 149247 + 927 = 150174
Step 163: 150174 + 927 = 151101
Step 164: 151101 + 927 = 152028
Step 165: 152028 + 927 = 152955
Step 166: 152955 + 927 = 153882
Step 167: 153882 + 927 = 154809
Step 168: 154809 + 927 = 155736
Step 169: 155736 + 927 = 156663
Step 170: 156663 + 927 = 157590
Step 171: 157590 + 927 = 158517
Step 172: 158517 + 927 = 159444
Step 173: 159444 + 927 = 160371
Step 174: 160371 + 927 = 161298
Step 175: 161298 + 927 = 162225
Step 176: 162225 + 927 = 163152
Step 177: 163152 + 927 = 164079
Step 178: 164079 + 927 = 165006
Step 179: 165006 + 927 = 165933
Step 180: 165933 + 927 = 166860
Step 181: 166860 + 927 = 167787
Step 182: 167787 + 927 = 168714
Step 183: 168714 + 927 = 169641
Step 184: 169641 + 927 = 170568
Step 185: 170568 + 927 = 171495
Step 186: 171495 + 927 = 172422
Step 187: 172422 + 927 = 173349
Step 188: 173349 + 927 = 174276
Step 189: 174276 + 927 = 175203
Step 190: 175203 + 927 = 176130
Step 191: 176130 + 927 = 177057
Step 192: 177057 + 927 = 177984
Step 193: 177984 + 927 = 178911
Step 194: 178911 + 927 = 179838
Step 195: 179838 + 927 = 180765
Step 196: 180765 + 927 = 181692
Step 197: 181692 + 927 = 182619
Step 198: 182619 + 927 = 183546
Step 199: 183546 + 927 = 184473
Step 200: 184473 + 927 = 185400
Step 201: 185400 + 927 = 186327
Step 202: 186327 + 927 = 187254
Step 203: 187254 + 927 = 188181
Step 204: 188181 + 927 = 189108
Step 205: 189108 + 927 = 190035
Step 206: 190035 + 927 = 190962
Step 207: 190962 + 927 = 191889
Step 208: 191889 + 927 = 192816
Step 209: 192816 + 927 = 193743
Step 210: 193743 + 927 = 194670
Step 211: 194670 + 927 = 195597
Step 212: 195597 + 927 = 196524
Step 213: 196524 + 927 = 197451
Step 214: 197451 + 927 = 198378
Step 215: 198378 + 927 = 199305
Step 216: 199305 + 927 = 200232
Step 217: 200232 + 927 = 201159
Step 218: 201159 + 927 = 202086
Step 219: 202086 + 927 = 203013
Step 220: 203013 + 927 = 203940
Step 221: 203940 + 927 = 204867
Step 222: 204867 + 927 = 205794
Step 223: 205794 + 927 = 206721
Step 224: 206721 + 927 = 207648
Step 225: 207648 + 927 = 208575
Step 226: 208575 + 927 = 209502
Step 227: 209502 + 927 = 210429
Step 228: 210429 + 927 = 211356
Step 229: 211356 + 927 = 212283
Step 230: 212283 + 927 = 213210
Step 231: 213210 + 927 = 214137
Step 232: 214137 + 927 = 215064
Step 233: 215064 + 927 = 215991
Step 234: 215991 + 927 = 216918
Step 235: 216918 + 927 = 217845
Step 236: 217845 + 927 = 218772
Step 237: 218772 + 927 = 219699
Step 238: 219699 + 927 = 220626
Step 239: 220626 + 927 = 221553
Step 240: 221553 + 927 = 222480
Step 241: 222480 + 927 = 223407
Step 242: 223407 + 927 = 224334
Step 243: 224334 + 927 = 225261
Step 244: 225261 + 927 = 226188
Step 245: 226188 + 927 = 227115
Step 246: 227115 + 927 = 228042
Step 247: 228042 + 927 = 228969
Step 248: 228969 + 927 = 229896
Step 249: 229896 + 927 = 230823
Step 250: 230823 + 927 = 231750
Step 251: 231750 + 927 = 232677
Step 252: 232677 + 927 = 233604
Step 253: 233604 + 927 = 234531
Step 254: 234531 + 927 = 235458
Step 255: 235458 + 927 = 236385
Step 256: 236385 + 927 = 237312
Step 257: 237312 + 927 = 238239
Step 258: 238239 + 927 = 239166
Step 259: 239166 + 927 = 240093
Step 260: 240093 + 927 = 241020
Step 261: 241020 + 927 = 241947
Step 262: 241947 + 927 = 242874
Step 263: 242874 + 927 = 243801
Step 264: 243801 + 927 = 244728
Step 265: 244728 + 927 = 245655
Step 266: 245655 + 927 = 246582
Step 267: 246582 + 927 = 247509
Step 268: 247509 + 927 = 248436
Step 269: 248436 + 927 = 249363
Step 270: 249363 + 927 = 250290
Step 271: 250290 + 927 = 251217
Step 272: 251217 + 927 = 252144
Step 273: 252144 + 927 = 253071
Step 274: 253071 + 927 = 253998
Step 275: 253998 + 927 = 254925
Step 276: 254925 + 927 = 255852
Step 277: 255852 + 927 = 256779
Step 278: 256779 + 927 = 257706
Step 279: 257706 + 927 = 258633
Step 280: 258633 + 927 = 259560
Step 281: 259560 + 927 = 260487
Step 282: 260487 + 927 = 261414
Step 283: 261414 + 927 = 262341
Step 284: 262341 + 927 = 263268
Step 285: 263268 + 927 = 264195
Step 286: 264195 + 927 = 265122
Step 287: 265122 + 927 = 266049
Step 288: 266049 + 927 = 266976
Step 289: 266976 + 927 = 267903
Step 290: 267903 + 927 = 268830
Step 291: 268830 + 927 = 269757
Step 292: 269757 + 927 = 270684
Step 293: 270684 + 927 = 271611
Step 294: 271611 + 927 = 272538
Step 295: 272538 + 927 = 273465
Step 296: 273465 + 927 = 274392
Step 297: 274392 + 927 = 275319
Step 298: 275319 + 927 = 276246
Step 299: 276246 + 927 = 277173
Step 300: 277173 + 927 = 278100
Step 301: 278100 + 927 = 279027
Step 302: 279027 + 927 = 279954
Step 303: 279954 + 927 = 280881
Step 304: 280881 + 927 = 281808
Step 305: 281808 + 927 = 282735
Step 306: 282735 + 927 = 283662
Step 307: 283662 + 927 = 284589
Step 308: 284589 + 927 = 285516
Step 309: 285516 + 927 = 286443
Step 310: 286443 + 927 = 287370
Step 311: 287370 + 927 = 288297
Step 312: 288297 + 927 = 289224
Step 313: 289224 + 927 = 290151
Step 314: 290151 + 927 = 291078
Step 315: 291078 + 927 = 292005
Step 316: 292005 + 927 = 292932
Step 317: 292932 + 927 = 293859
Step 318: 293859 + 927 = 294786
Step 319: 294786 + 927 = 295713
Step 320: 295713 + 927 = 296640
Step 321: 296640 + 927 = 297567
Step 322: 297567 + 927 = 298494
Step 323: 298494 + 927 = 299421
Step 324: 299421 + 927 = 300348
Step 325: 300348 + 927 = 301275
Step 326: 301275 + 927 = 302202
Step 327: 302202 + 927 = 303129
Step 328: 303129 + 927 = 304056
Step 329: 304056 + 927 = 304983
Step 330: 304983 + 927 = 305910
Step 331: 305910 + 927 = 306837
Step 332: 306837 + 927 = 307764
Step 333: 307764 + 927 = 308691
Step 334: 308691 + 927 = 309618
Step 335: 309618 + 927 = 310545
Step 336: 310545 + 927 = 311472
Step 337: 311472 + 927 = 312399
Step 338: 312399 + 927 = 313326
Step 339: 313326 + 927 = 314253
Step 340: 314253 + 927 = 315180
Step 341: 315180 + 927 = 316107
Step 342: 316107 + 927 = 317034
Step 343: 317034 + 927 = 317961
Step 344: 317961 + 927 = 318888
Step 345: 318888 + 927 = 319815
Step 346: 319815 + 927 = 320742
Step 347: 320742 + 927 = 321669
Step 348: 321669 + 927 = 322596
Step 349: 322596 + 927 = 323523
Step 350: 323523 + 927 = 324450
Step 351: 324450 + 927 = 325377
Step 352: 325377 + 927 = 326304
Step 353: 326304 + 927 = 327231
Step 354: 327231 + 927 = 328158
Step 355: 328158 + 927 = 329085
Step 356: 329085 + 927 = 330012
Step 357: 330012 + 927 = 330939
Step 358: 330939 + 927 = 331866
Step 359: 331866 + 927 = 332793
Step 360: 332793 + 927 = 333720
Step 361: 333720 + 927 = 334647
Step 362: 334647 + 927 = 335574
Step 363: 335574 + 927 = 336501
Step 364: 336501 + 927 = 337428
Step 365: 337428 + 927 = 338355
Step 366: 338355 + 927 = 339282
Step 367: 339282 + 927 = 340209
Step 368: 340209 + 927 = 341136
Step 369: 341136 + 927 = 342063
Step 370: 342063 + 927 = 342990
Step 371: 342990 + 927 = 343917
Step 372: 343917 + 927 = 344844
Step 373: 344844 + 927 = 345771
Step 374: 345771 + 927 = 346698
Step 375: 346698 + 927 = 347625
Step 376: 347625 + 927 = 348552
Step 377: 348552 + 927 = 349479
Step 378: 349479 + 927 = 350406
Step 379: 350406 + 927 = 351333
Step 380: 351333 + 927 = 352260
Step 381: 352260 + 927 = 353187
Step 382: 353187 + 927 = 354114
Step 383: 354114 + 927 = 355041
Step 384: 355041 + 927 = 355968
Step 385: 355968 + 927 = 356895
Step 386: 356895 + 927 = 357822
Step 387: 357822 + 927 = 358749
Step 388: 358749 + 927 = 359676
Step 389: 359676 + 927 = 360603
Step 390: 360603 + 927 = 361530
Step 391: 361530 + 927 = 362457
Step 392: 362457 + 927 = 363384
Step 393: 363384 + 927 = 364311
Step 394: 364311 + 927 = 365238
Step 395: 365238 + 927 = 366165
Step 396: 366165 + 927 = 367092
Step 397: 367092 + 927 = 368019
Step 398: 368019 + 927 = 368946
Step 399: 368946 + 927 = 369873
Step 400: 369873 + 927 = 370800
Step 401: 370800 + 927 = 371727
Step 402: 371727 + 927 = 372654
Step 403: 372654 + 927 = 373581
Step 404: 373581 + 927 = 374508
Step 405: 374508 + 927 = 375435

So, 927*405 = 375435