OK, let's crack this. We're given 388 and our task is to multiply it by 424. Essentially, we'll be adding 388 to itself 424 times.
Step 1: 0 + 388 = 388
Step 2: 388 + 388 = 776
Step 3: 776 + 388 = 1164
Step 4: 1164 + 388 = 1552
Step 5: 1552 + 388 = 1940
Step 6: 1940 + 388 = 2328
Step 7: 2328 + 388 = 2716
Step 8: 2716 + 388 = 3104
Step 9: 3104 + 388 = 3492
Step 10: 3492 + 388 = 3880
Step 11: 3880 + 388 = 4268
Step 12: 4268 + 388 = 4656
Step 13: 4656 + 388 = 5044
Step 14: 5044 + 388 = 5432
Step 15: 5432 + 388 = 5820
Step 16: 5820 + 388 = 6208
Step 17: 6208 + 388 = 6596
Step 18: 6596 + 388 = 6984
Step 19: 6984 + 388 = 7372
Step 20: 7372 + 388 = 7760
Step 21: 7760 + 388 = 8148
Step 22: 8148 + 388 = 8536
Step 23: 8536 + 388 = 8924
Step 24: 8924 + 388 = 9312
Step 25: 9312 + 388 = 9700
Step 26: 9700 + 388 = 10088
Step 27: 10088 + 388 = 10476
Step 28: 10476 + 388 = 10864
Step 29: 10864 + 388 = 11252
Step 30: 11252 + 388 = 11640
Step 31: 11640 + 388 = 12028
Step 32: 12028 + 388 = 12416
Step 33: 12416 + 388 = 12804
Step 34: 12804 + 388 = 13192
Step 35: 13192 + 388 = 13580
Step 36: 13580 + 388 = 13968
Step 37: 13968 + 388 = 14356
Step 38: 14356 + 388 = 14744
Step 39: 14744 + 388 = 15132
Step 40: 15132 + 388 = 15520
Step 41: 15520 + 388 = 15908
Step 42: 15908 + 388 = 16296
Step 43: 16296 + 388 = 16684
Step 44: 16684 + 388 = 17072
Step 45: 17072 + 388 = 17460
Step 46: 17460 + 388 = 17848
Step 47: 17848 + 388 = 18236
Step 48: 18236 + 388 = 18624
Step 49: 18624 + 388 = 19012
Step 50: 19012 + 388 = 19400
Step 51: 19400 + 388 = 19788
Step 52: 19788 + 388 = 20176
Step 53: 20176 + 388 = 20564
Step 54: 20564 + 388 = 20952
Step 55: 20952 + 388 = 21340
Step 56: 21340 + 388 = 21728
Step 57: 21728 + 388 = 22116
Step 58: 22116 + 388 = 22504
Step 59: 22504 + 388 = 22892
Step 60: 22892 + 388 = 23280
Step 61: 23280 + 388 = 23668
Step 62: 23668 + 388 = 24056
Step 63: 24056 + 388 = 24444
Step 64: 24444 + 388 = 24832
Step 65: 24832 + 388 = 25220
Step 66: 25220 + 388 = 25608
Step 67: 25608 + 388 = 25996
Step 68: 25996 + 388 = 26384
Step 69: 26384 + 388 = 26772
Step 70: 26772 + 388 = 27160
Step 71: 27160 + 388 = 27548
Step 72: 27548 + 388 = 27936
Step 73: 27936 + 388 = 28324
Step 74: 28324 + 388 = 28712
Step 75: 28712 + 388 = 29100
Step 76: 29100 + 388 = 29488
Step 77: 29488 + 388 = 29876
Step 78: 29876 + 388 = 30264
Step 79: 30264 + 388 = 30652
Step 80: 30652 + 388 = 31040
Step 81: 31040 + 388 = 31428
Step 82: 31428 + 388 = 31816
Step 83: 31816 + 388 = 32204
Step 84: 32204 + 388 = 32592
Step 85: 32592 + 388 = 32980
Step 86: 32980 + 388 = 33368
Step 87: 33368 + 388 = 33756
Step 88: 33756 + 388 = 34144
Step 89: 34144 + 388 = 34532
Step 90: 34532 + 388 = 34920
Step 91: 34920 + 388 = 35308
Step 92: 35308 + 388 = 35696
Step 93: 35696 + 388 = 36084
Step 94: 36084 + 388 = 36472
Step 95: 36472 + 388 = 36860
Step 96: 36860 + 388 = 37248
Step 97: 37248 + 388 = 37636
Step 98: 37636 + 388 = 38024
Step 99: 38024 + 388 = 38412
Step 100: 38412 + 388 = 38800
Step 101: 38800 + 388 = 39188
Step 102: 39188 + 388 = 39576
Step 103: 39576 + 388 = 39964
Step 104: 39964 + 388 = 40352
Step 105: 40352 + 388 = 40740
Step 106: 40740 + 388 = 41128
Step 107: 41128 + 388 = 41516
Step 108: 41516 + 388 = 41904
Step 109: 41904 + 388 = 42292
Step 110: 42292 + 388 = 42680
Step 111: 42680 + 388 = 43068
Step 112: 43068 + 388 = 43456
Step 113: 43456 + 388 = 43844
Step 114: 43844 + 388 = 44232
Step 115: 44232 + 388 = 44620
Step 116: 44620 + 388 = 45008
Step 117: 45008 + 388 = 45396
Step 118: 45396 + 388 = 45784
Step 119: 45784 + 388 = 46172
Step 120: 46172 + 388 = 46560
Step 121: 46560 + 388 = 46948
Step 122: 46948 + 388 = 47336
Step 123: 47336 + 388 = 47724
Step 124: 47724 + 388 = 48112
Step 125: 48112 + 388 = 48500
Step 126: 48500 + 388 = 48888
Step 127: 48888 + 388 = 49276
Step 128: 49276 + 388 = 49664
Step 129: 49664 + 388 = 50052
Step 130: 50052 + 388 = 50440
Step 131: 50440 + 388 = 50828
Step 132: 50828 + 388 = 51216
Step 133: 51216 + 388 = 51604
Step 134: 51604 + 388 = 51992
Step 135: 51992 + 388 = 52380
Step 136: 52380 + 388 = 52768
Step 137: 52768 + 388 = 53156
Step 138: 53156 + 388 = 53544
Step 139: 53544 + 388 = 53932
Step 140: 53932 + 388 = 54320
Step 141: 54320 + 388 = 54708
Step 142: 54708 + 388 = 55096
Step 143: 55096 + 388 = 55484
Step 144: 55484 + 388 = 55872
Step 145: 55872 + 388 = 56260
Step 146: 56260 + 388 = 56648
Step 147: 56648 + 388 = 57036
Step 148: 57036 + 388 = 57424
Step 149: 57424 + 388 = 57812
Step 150: 57812 + 388 = 58200
Step 151: 58200 + 388 = 58588
Step 152: 58588 + 388 = 58976
Step 153: 58976 + 388 = 59364
Step 154: 59364 + 388 = 59752
Step 155: 59752 + 388 = 60140
Step 156: 60140 + 388 = 60528
Step 157: 60528 + 388 = 60916
Step 158: 60916 + 388 = 61304
Step 159: 61304 + 388 = 61692
Step 160: 61692 + 388 = 62080
Step 161: 62080 + 388 = 62468
Step 162: 62468 + 388 = 62856
Step 163: 62856 + 388 = 63244
Step 164: 63244 + 388 = 63632
Step 165: 63632 + 388 = 64020
Step 166: 64020 + 388 = 64408
Step 167: 64408 + 388 = 64796
Step 168: 64796 + 388 = 65184
Step 169: 65184 + 388 = 65572
Step 170: 65572 + 388 = 65960
Step 171: 65960 + 388 = 66348
Step 172: 66348 + 388 = 66736
Step 173: 66736 + 388 = 67124
Step 174: 67124 + 388 = 67512
Step 175: 67512 + 388 = 67900
Step 176: 67900 + 388 = 68288
Step 177: 68288 + 388 = 68676
Step 178: 68676 + 388 = 69064
Step 179: 69064 + 388 = 69452
Step 180: 69452 + 388 = 69840
Step 181: 69840 + 388 = 70228
Step 182: 70228 + 388 = 70616
Step 183: 70616 + 388 = 71004
Step 184: 71004 + 388 = 71392
Step 185: 71392 + 388 = 71780
Step 186: 71780 + 388 = 72168
Step 187: 72168 + 388 = 72556
Step 188: 72556 + 388 = 72944
Step 189: 72944 + 388 = 73332
Step 190: 73332 + 388 = 73720
Step 191: 73720 + 388 = 74108
Step 192: 74108 + 388 = 74496
Step 193: 74496 + 388 = 74884
Step 194: 74884 + 388 = 75272
Step 195: 75272 + 388 = 75660
Step 196: 75660 + 388 = 76048
Step 197: 76048 + 388 = 76436
Step 198: 76436 + 388 = 76824
Step 199: 76824 + 388 = 77212
Step 200: 77212 + 388 = 77600
Step 201: 77600 + 388 = 77988
Step 202: 77988 + 388 = 78376
Step 203: 78376 + 388 = 78764
Step 204: 78764 + 388 = 79152
Step 205: 79152 + 388 = 79540
Step 206: 79540 + 388 = 79928
Step 207: 79928 + 388 = 80316
Step 208: 80316 + 388 = 80704
Step 209: 80704 + 388 = 81092
Step 210: 81092 + 388 = 81480
Step 211: 81480 + 388 = 81868
Step 212: 81868 + 388 = 82256
Step 213: 82256 + 388 = 82644
Step 214: 82644 + 388 = 83032
Step 215: 83032 + 388 = 83420
Step 216: 83420 + 388 = 83808
Step 217: 83808 + 388 = 84196
Step 218: 84196 + 388 = 84584
Step 219: 84584 + 388 = 84972
Step 220: 84972 + 388 = 85360
Step 221: 85360 + 388 = 85748
Step 222: 85748 + 388 = 86136
Step 223: 86136 + 388 = 86524
Step 224: 86524 + 388 = 86912
Step 225: 86912 + 388 = 87300
Step 226: 87300 + 388 = 87688
Step 227: 87688 + 388 = 88076
Step 228: 88076 + 388 = 88464
Step 229: 88464 + 388 = 88852
Step 230: 88852 + 388 = 89240
Step 231: 89240 + 388 = 89628
Step 232: 89628 + 388 = 90016
Step 233: 90016 + 388 = 90404
Step 234: 90404 + 388 = 90792
Step 235: 90792 + 388 = 91180
Step 236: 91180 + 388 = 91568
Step 237: 91568 + 388 = 91956
Step 238: 91956 + 388 = 92344
Step 239: 92344 + 388 = 92732
Step 240: 92732 + 388 = 93120
Step 241: 93120 + 388 = 93508
Step 242: 93508 + 388 = 93896
Step 243: 93896 + 388 = 94284
Step 244: 94284 + 388 = 94672
Step 245: 94672 + 388 = 95060
Step 246: 95060 + 388 = 95448
Step 247: 95448 + 388 = 95836
Step 248: 95836 + 388 = 96224
Step 249: 96224 + 388 = 96612
Step 250: 96612 + 388 = 97000
Step 251: 97000 + 388 = 97388
Step 252: 97388 + 388 = 97776
Step 253: 97776 + 388 = 98164
Step 254: 98164 + 388 = 98552
Step 255: 98552 + 388 = 98940
Step 256: 98940 + 388 = 99328
Step 257: 99328 + 388 = 99716
Step 258: 99716 + 388 = 100104
Step 259: 100104 + 388 = 100492
Step 260: 100492 + 388 = 100880
Step 261: 100880 + 388 = 101268
Step 262: 101268 + 388 = 101656
Step 263: 101656 + 388 = 102044
Step 264: 102044 + 388 = 102432
Step 265: 102432 + 388 = 102820
Step 266: 102820 + 388 = 103208
Step 267: 103208 + 388 = 103596
Step 268: 103596 + 388 = 103984
Step 269: 103984 + 388 = 104372
Step 270: 104372 + 388 = 104760
Step 271: 104760 + 388 = 105148
Step 272: 105148 + 388 = 105536
Step 273: 105536 + 388 = 105924
Step 274: 105924 + 388 = 106312
Step 275: 106312 + 388 = 106700
Step 276: 106700 + 388 = 107088
Step 277: 107088 + 388 = 107476
Step 278: 107476 + 388 = 107864
Step 279: 107864 + 388 = 108252
Step 280: 108252 + 388 = 108640
Step 281: 108640 + 388 = 109028
Step 282: 109028 + 388 = 109416
Step 283: 109416 + 388 = 109804
Step 284: 109804 + 388 = 110192
Step 285: 110192 + 388 = 110580
Step 286: 110580 + 388 = 110968
Step 287: 110968 + 388 = 111356
Step 288: 111356 + 388 = 111744
Step 289: 111744 + 388 = 112132
Step 290: 112132 + 388 = 112520
Step 291: 112520 + 388 = 112908
Step 292: 112908 + 388 = 113296
Step 293: 113296 + 388 = 113684
Step 294: 113684 + 388 = 114072
Step 295: 114072 + 388 = 114460
Step 296: 114460 + 388 = 114848
Step 297: 114848 + 388 = 115236
Step 298: 115236 + 388 = 115624
Step 299: 115624 + 388 = 116012
Step 300: 116012 + 388 = 116400
Step 301: 116400 + 388 = 116788
Step 302: 116788 + 388 = 117176
Step 303: 117176 + 388 = 117564
Step 304: 117564 + 388 = 117952
Step 305: 117952 + 388 = 118340
Step 306: 118340 + 388 = 118728
Step 307: 118728 + 388 = 119116
Step 308: 119116 + 388 = 119504
Step 309: 119504 + 388 = 119892
Step 310: 119892 + 388 = 120280
Step 311: 120280 + 388 = 120668
Step 312: 120668 + 388 = 121056
Step 313: 121056 + 388 = 121444
Step 314: 121444 + 388 = 121832
Step 315: 121832 + 388 = 122220
Step 316: 122220 + 388 = 122608
Step 317: 122608 + 388 = 122996
Step 318: 122996 + 388 = 123384
Step 319: 123384 + 388 = 123772
Step 320: 123772 + 388 = 124160
Step 321: 124160 + 388 = 124548
Step 322: 124548 + 388 = 124936
Step 323: 124936 + 388 = 125324
Step 324: 125324 + 388 = 125712
Step 325: 125712 + 388 = 126100
Step 326: 126100 + 388 = 126488
Step 327: 126488 + 388 = 126876
Step 328: 126876 + 388 = 127264
Step 329: 127264 + 388 = 127652
Step 330: 127652 + 388 = 128040
Step 331: 128040 + 388 = 128428
Step 332: 128428 + 388 = 128816
Step 333: 128816 + 388 = 129204
Step 334: 129204 + 388 = 129592
Step 335: 129592 + 388 = 129980
Step 336: 129980 + 388 = 130368
Step 337: 130368 + 388 = 130756
Step 338: 130756 + 388 = 131144
Step 339: 131144 + 388 = 131532
Step 340: 131532 + 388 = 131920
Step 341: 131920 + 388 = 132308
Step 342: 132308 + 388 = 132696
Step 343: 132696 + 388 = 133084
Step 344: 133084 + 388 = 133472
Step 345: 133472 + 388 = 133860
Step 346: 133860 + 388 = 134248
Step 347: 134248 + 388 = 134636
Step 348: 134636 + 388 = 135024
Step 349: 135024 + 388 = 135412
Step 350: 135412 + 388 = 135800
Step 351: 135800 + 388 = 136188
Step 352: 136188 + 388 = 136576
Step 353: 136576 + 388 = 136964
Step 354: 136964 + 388 = 137352
Step 355: 137352 + 388 = 137740
Step 356: 137740 + 388 = 138128
Step 357: 138128 + 388 = 138516
Step 358: 138516 + 388 = 138904
Step 359: 138904 + 388 = 139292
Step 360: 139292 + 388 = 139680
Step 361: 139680 + 388 = 140068
Step 362: 140068 + 388 = 140456
Step 363: 140456 + 388 = 140844
Step 364: 140844 + 388 = 141232
Step 365: 141232 + 388 = 141620
Step 366: 141620 + 388 = 142008
Step 367: 142008 + 388 = 142396
Step 368: 142396 + 388 = 142784
Step 369: 142784 + 388 = 143172
Step 370: 143172 + 388 = 143560
Step 371: 143560 + 388 = 143948
Step 372: 143948 + 388 = 144336
Step 373: 144336 + 388 = 144724
Step 374: 144724 + 388 = 145112
Step 375: 145112 + 388 = 145500
Step 376: 145500 + 388 = 145888
Step 377: 145888 + 388 = 146276
Step 378: 146276 + 388 = 146664
Step 379: 146664 + 388 = 147052
Step 380: 147052 + 388 = 147440
Step 381: 147440 + 388 = 147828
Step 382: 147828 + 388 = 148216
Step 383: 148216 + 388 = 148604
Step 384: 148604 + 388 = 148992
Step 385: 148992 + 388 = 149380
Step 386: 149380 + 388 = 149768
Step 387: 149768 + 388 = 150156
Step 388: 150156 + 388 = 150544
Step 389: 150544 + 388 = 150932
Step 390: 150932 + 388 = 151320
Step 391: 151320 + 388 = 151708
Step 392: 151708 + 388 = 152096
Step 393: 152096 + 388 = 152484
Step 394: 152484 + 388 = 152872
Step 395: 152872 + 388 = 153260
Step 396: 153260 + 388 = 153648
Step 397: 153648 + 388 = 154036
Step 398: 154036 + 388 = 154424
Step 399: 154424 + 388 = 154812
Step 400: 154812 + 388 = 155200
Step 401: 155200 + 388 = 155588
Step 402: 155588 + 388 = 155976
Step 403: 155976 + 388 = 156364
Step 404: 156364 + 388 = 156752
Step 405: 156752 + 388 = 157140
Step 406: 157140 + 388 = 157528
Step 407: 157528 + 388 = 157916
Step 408: 157916 + 388 = 158304
Step 409: 158304 + 388 = 158692
Step 410: 158692 + 388 = 159080
Step 411: 159080 + 388 = 159468
Step 412: 159468 + 388 = 159856
Step 413: 159856 + 388 = 160244
Step 414: 160244 + 388 = 160632
Step 415: 160632 + 388 = 161020
Step 416: 161020 + 388 = 161408
Step 417: 161408 + 388 = 161796
Step 418: 161796 + 388 = 162184
Step 419: 162184 + 388 = 162572
Step 420: 162572 + 388 = 162960
Step 421: 162960 + 388 = 163348
Step 422: 163348 + 388 = 163736
Step 423: 163736 + 388 = 164124
Step 424: 164124 + 388 = 164512

So, 388*424 = 164512