Let's get this math done. We have 12 and we're going to multiply it by 429. This is the same as taking 12 and adding it to itself 429 times.
Step 1: 0 + 12 = 12
Step 2: 12 + 12 = 24
Step 3: 24 + 12 = 36
Step 4: 36 + 12 = 48
Step 5: 48 + 12 = 60
Step 6: 60 + 12 = 72
Step 7: 72 + 12 = 84
Step 8: 84 + 12 = 96
Step 9: 96 + 12 = 108
Step 10: 108 + 12 = 120
Step 11: 120 + 12 = 132
Step 12: 132 + 12 = 144
Step 13: 144 + 12 = 156
Step 14: 156 + 12 = 168
Step 15: 168 + 12 = 180
Step 16: 180 + 12 = 192
Step 17: 192 + 12 = 204
Step 18: 204 + 12 = 216
Step 19: 216 + 12 = 228
Step 20: 228 + 12 = 240
Step 21: 240 + 12 = 252
Step 22: 252 + 12 = 264
Step 23: 264 + 12 = 276
Step 24: 276 + 12 = 288
Step 25: 288 + 12 = 300
Step 26: 300 + 12 = 312
Step 27: 312 + 12 = 324
Step 28: 324 + 12 = 336
Step 29: 336 + 12 = 348
Step 30: 348 + 12 = 360
Step 31: 360 + 12 = 372
Step 32: 372 + 12 = 384
Step 33: 384 + 12 = 396
Step 34: 396 + 12 = 408
Step 35: 408 + 12 = 420
Step 36: 420 + 12 = 432
Step 37: 432 + 12 = 444
Step 38: 444 + 12 = 456
Step 39: 456 + 12 = 468
Step 40: 468 + 12 = 480
Step 41: 480 + 12 = 492
Step 42: 492 + 12 = 504
Step 43: 504 + 12 = 516
Step 44: 516 + 12 = 528
Step 45: 528 + 12 = 540
Step 46: 540 + 12 = 552
Step 47: 552 + 12 = 564
Step 48: 564 + 12 = 576
Step 49: 576 + 12 = 588
Step 50: 588 + 12 = 600
Step 51: 600 + 12 = 612
Step 52: 612 + 12 = 624
Step 53: 624 + 12 = 636
Step 54: 636 + 12 = 648
Step 55: 648 + 12 = 660
Step 56: 660 + 12 = 672
Step 57: 672 + 12 = 684
Step 58: 684 + 12 = 696
Step 59: 696 + 12 = 708
Step 60: 708 + 12 = 720
Step 61: 720 + 12 = 732
Step 62: 732 + 12 = 744
Step 63: 744 + 12 = 756
Step 64: 756 + 12 = 768
Step 65: 768 + 12 = 780
Step 66: 780 + 12 = 792
Step 67: 792 + 12 = 804
Step 68: 804 + 12 = 816
Step 69: 816 + 12 = 828
Step 70: 828 + 12 = 840
Step 71: 840 + 12 = 852
Step 72: 852 + 12 = 864
Step 73: 864 + 12 = 876
Step 74: 876 + 12 = 888
Step 75: 888 + 12 = 900
Step 76: 900 + 12 = 912
Step 77: 912 + 12 = 924
Step 78: 924 + 12 = 936
Step 79: 936 + 12 = 948
Step 80: 948 + 12 = 960
Step 81: 960 + 12 = 972
Step 82: 972 + 12 = 984
Step 83: 984 + 12 = 996
Step 84: 996 + 12 = 1008
Step 85: 1008 + 12 = 1020
Step 86: 1020 + 12 = 1032
Step 87: 1032 + 12 = 1044
Step 88: 1044 + 12 = 1056
Step 89: 1056 + 12 = 1068
Step 90: 1068 + 12 = 1080
Step 91: 1080 + 12 = 1092
Step 92: 1092 + 12 = 1104
Step 93: 1104 + 12 = 1116
Step 94: 1116 + 12 = 1128
Step 95: 1128 + 12 = 1140
Step 96: 1140 + 12 = 1152
Step 97: 1152 + 12 = 1164
Step 98: 1164 + 12 = 1176
Step 99: 1176 + 12 = 1188
Step 100: 1188 + 12 = 1200
Step 101: 1200 + 12 = 1212
Step 102: 1212 + 12 = 1224
Step 103: 1224 + 12 = 1236
Step 104: 1236 + 12 = 1248
Step 105: 1248 + 12 = 1260
Step 106: 1260 + 12 = 1272
Step 107: 1272 + 12 = 1284
Step 108: 1284 + 12 = 1296
Step 109: 1296 + 12 = 1308
Step 110: 1308 + 12 = 1320
Step 111: 1320 + 12 = 1332
Step 112: 1332 + 12 = 1344
Step 113: 1344 + 12 = 1356
Step 114: 1356 + 12 = 1368
Step 115: 1368 + 12 = 1380
Step 116: 1380 + 12 = 1392
Step 117: 1392 + 12 = 1404
Step 118: 1404 + 12 = 1416
Step 119: 1416 + 12 = 1428
Step 120: 1428 + 12 = 1440
Step 121: 1440 + 12 = 1452
Step 122: 1452 + 12 = 1464
Step 123: 1464 + 12 = 1476
Step 124: 1476 + 12 = 1488
Step 125: 1488 + 12 = 1500
Step 126: 1500 + 12 = 1512
Step 127: 1512 + 12 = 1524
Step 128: 1524 + 12 = 1536
Step 129: 1536 + 12 = 1548
Step 130: 1548 + 12 = 1560
Step 131: 1560 + 12 = 1572
Step 132: 1572 + 12 = 1584
Step 133: 1584 + 12 = 1596
Step 134: 1596 + 12 = 1608
Step 135: 1608 + 12 = 1620
Step 136: 1620 + 12 = 1632
Step 137: 1632 + 12 = 1644
Step 138: 1644 + 12 = 1656
Step 139: 1656 + 12 = 1668
Step 140: 1668 + 12 = 1680
Step 141: 1680 + 12 = 1692
Step 142: 1692 + 12 = 1704
Step 143: 1704 + 12 = 1716
Step 144: 1716 + 12 = 1728
Step 145: 1728 + 12 = 1740
Step 146: 1740 + 12 = 1752
Step 147: 1752 + 12 = 1764
Step 148: 1764 + 12 = 1776
Step 149: 1776 + 12 = 1788
Step 150: 1788 + 12 = 1800
Step 151: 1800 + 12 = 1812
Step 152: 1812 + 12 = 1824
Step 153: 1824 + 12 = 1836
Step 154: 1836 + 12 = 1848
Step 155: 1848 + 12 = 1860
Step 156: 1860 + 12 = 1872
Step 157: 1872 + 12 = 1884
Step 158: 1884 + 12 = 1896
Step 159: 1896 + 12 = 1908
Step 160: 1908 + 12 = 1920
Step 161: 1920 + 12 = 1932
Step 162: 1932 + 12 = 1944
Step 163: 1944 + 12 = 1956
Step 164: 1956 + 12 = 1968
Step 165: 1968 + 12 = 1980
Step 166: 1980 + 12 = 1992
Step 167: 1992 + 12 = 2004
Step 168: 2004 + 12 = 2016
Step 169: 2016 + 12 = 2028
Step 170: 2028 + 12 = 2040
Step 171: 2040 + 12 = 2052
Step 172: 2052 + 12 = 2064
Step 173: 2064 + 12 = 2076
Step 174: 2076 + 12 = 2088
Step 175: 2088 + 12 = 2100
Step 176: 2100 + 12 = 2112
Step 177: 2112 + 12 = 2124
Step 178: 2124 + 12 = 2136
Step 179: 2136 + 12 = 2148
Step 180: 2148 + 12 = 2160
Step 181: 2160 + 12 = 2172
Step 182: 2172 + 12 = 2184
Step 183: 2184 + 12 = 2196
Step 184: 2196 + 12 = 2208
Step 185: 2208 + 12 = 2220
Step 186: 2220 + 12 = 2232
Step 187: 2232 + 12 = 2244
Step 188: 2244 + 12 = 2256
Step 189: 2256 + 12 = 2268
Step 190: 2268 + 12 = 2280
Step 191: 2280 + 12 = 2292
Step 192: 2292 + 12 = 2304
Step 193: 2304 + 12 = 2316
Step 194: 2316 + 12 = 2328
Step 195: 2328 + 12 = 2340
Step 196: 2340 + 12 = 2352
Step 197: 2352 + 12 = 2364
Step 198: 2364 + 12 = 2376
Step 199: 2376 + 12 = 2388
Step 200: 2388 + 12 = 2400
Step 201: 2400 + 12 = 2412
Step 202: 2412 + 12 = 2424
Step 203: 2424 + 12 = 2436
Step 204: 2436 + 12 = 2448
Step 205: 2448 + 12 = 2460
Step 206: 2460 + 12 = 2472
Step 207: 2472 + 12 = 2484
Step 208: 2484 + 12 = 2496
Step 209: 2496 + 12 = 2508
Step 210: 2508 + 12 = 2520
Step 211: 2520 + 12 = 2532
Step 212: 2532 + 12 = 2544
Step 213: 2544 + 12 = 2556
Step 214: 2556 + 12 = 2568
Step 215: 2568 + 12 = 2580
Step 216: 2580 + 12 = 2592
Step 217: 2592 + 12 = 2604
Step 218: 2604 + 12 = 2616
Step 219: 2616 + 12 = 2628
Step 220: 2628 + 12 = 2640
Step 221: 2640 + 12 = 2652
Step 222: 2652 + 12 = 2664
Step 223: 2664 + 12 = 2676
Step 224: 2676 + 12 = 2688
Step 225: 2688 + 12 = 2700
Step 226: 2700 + 12 = 2712
Step 227: 2712 + 12 = 2724
Step 228: 2724 + 12 = 2736
Step 229: 2736 + 12 = 2748
Step 230: 2748 + 12 = 2760
Step 231: 2760 + 12 = 2772
Step 232: 2772 + 12 = 2784
Step 233: 2784 + 12 = 2796
Step 234: 2796 + 12 = 2808
Step 235: 2808 + 12 = 2820
Step 236: 2820 + 12 = 2832
Step 237: 2832 + 12 = 2844
Step 238: 2844 + 12 = 2856
Step 239: 2856 + 12 = 2868
Step 240: 2868 + 12 = 2880
Step 241: 2880 + 12 = 2892
Step 242: 2892 + 12 = 2904
Step 243: 2904 + 12 = 2916
Step 244: 2916 + 12 = 2928
Step 245: 2928 + 12 = 2940
Step 246: 2940 + 12 = 2952
Step 247: 2952 + 12 = 2964
Step 248: 2964 + 12 = 2976
Step 249: 2976 + 12 = 2988
Step 250: 2988 + 12 = 3000
Step 251: 3000 + 12 = 3012
Step 252: 3012 + 12 = 3024
Step 253: 3024 + 12 = 3036
Step 254: 3036 + 12 = 3048
Step 255: 3048 + 12 = 3060
Step 256: 3060 + 12 = 3072
Step 257: 3072 + 12 = 3084
Step 258: 3084 + 12 = 3096
Step 259: 3096 + 12 = 3108
Step 260: 3108 + 12 = 3120
Step 261: 3120 + 12 = 3132
Step 262: 3132 + 12 = 3144
Step 263: 3144 + 12 = 3156
Step 264: 3156 + 12 = 3168
Step 265: 3168 + 12 = 3180
Step 266: 3180 + 12 = 3192
Step 267: 3192 + 12 = 3204
Step 268: 3204 + 12 = 3216
Step 269: 3216 + 12 = 3228
Step 270: 3228 + 12 = 3240
Step 271: 3240 + 12 = 3252
Step 272: 3252 + 12 = 3264
Step 273: 3264 + 12 = 3276
Step 274: 3276 + 12 = 3288
Step 275: 3288 + 12 = 3300
Step 276: 3300 + 12 = 3312
Step 277: 3312 + 12 = 3324
Step 278: 3324 + 12 = 3336
Step 279: 3336 + 12 = 3348
Step 280: 3348 + 12 = 3360
Step 281: 3360 + 12 = 3372
Step 282: 3372 + 12 = 3384
Step 283: 3384 + 12 = 3396
Step 284: 3396 + 12 = 3408
Step 285: 3408 + 12 = 3420
Step 286: 3420 + 12 = 3432
Step 287: 3432 + 12 = 3444
Step 288: 3444 + 12 = 3456
Step 289: 3456 + 12 = 3468
Step 290: 3468 + 12 = 3480
Step 291: 3480 + 12 = 3492
Step 292: 3492 + 12 = 3504
Step 293: 3504 + 12 = 3516
Step 294: 3516 + 12 = 3528
Step 295: 3528 + 12 = 3540
Step 296: 3540 + 12 = 3552
Step 297: 3552 + 12 = 3564
Step 298: 3564 + 12 = 3576
Step 299: 3576 + 12 = 3588
Step 300: 3588 + 12 = 3600
Step 301: 3600 + 12 = 3612
Step 302: 3612 + 12 = 3624
Step 303: 3624 + 12 = 3636
Step 304: 3636 + 12 = 3648
Step 305: 3648 + 12 = 3660
Step 306: 3660 + 12 = 3672
Step 307: 3672 + 12 = 3684
Step 308: 3684 + 12 = 3696
Step 309: 3696 + 12 = 3708
Step 310: 3708 + 12 = 3720
Step 311: 3720 + 12 = 3732
Step 312: 3732 + 12 = 3744
Step 313: 3744 + 12 = 3756
Step 314: 3756 + 12 = 3768
Step 315: 3768 + 12 = 3780
Step 316: 3780 + 12 = 3792
Step 317: 3792 + 12 = 3804
Step 318: 3804 + 12 = 3816
Step 319: 3816 + 12 = 3828
Step 320: 3828 + 12 = 3840
Step 321: 3840 + 12 = 3852
Step 322: 3852 + 12 = 3864
Step 323: 3864 + 12 = 3876
Step 324: 3876 + 12 = 3888
Step 325: 3888 + 12 = 3900
Step 326: 3900 + 12 = 3912
Step 327: 3912 + 12 = 3924
Step 328: 3924 + 12 = 3936
Step 329: 3936 + 12 = 3948
Step 330: 3948 + 12 = 3960
Step 331: 3960 + 12 = 3972
Step 332: 3972 + 12 = 3984
Step 333: 3984 + 12 = 3996
Step 334: 3996 + 12 = 4008
Step 335: 4008 + 12 = 4020
Step 336: 4020 + 12 = 4032
Step 337: 4032 + 12 = 4044
Step 338: 4044 + 12 = 4056
Step 339: 4056 + 12 = 4068
Step 340: 4068 + 12 = 4080
Step 341: 4080 + 12 = 4092
Step 342: 4092 + 12 = 4104
Step 343: 4104 + 12 = 4116
Step 344: 4116 + 12 = 4128
Step 345: 4128 + 12 = 4140
Step 346: 4140 + 12 = 4152
Step 347: 4152 + 12 = 4164
Step 348: 4164 + 12 = 4176
Step 349: 4176 + 12 = 4188
Step 350: 4188 + 12 = 4200
Step 351: 4200 + 12 = 4212
Step 352: 4212 + 12 = 4224
Step 353: 4224 + 12 = 4236
Step 354: 4236 + 12 = 4248
Step 355: 4248 + 12 = 4260
Step 356: 4260 + 12 = 4272
Step 357: 4272 + 12 = 4284
Step 358: 4284 + 12 = 4296
Step 359: 4296 + 12 = 4308
Step 360: 4308 + 12 = 4320
Step 361: 4320 + 12 = 4332
Step 362: 4332 + 12 = 4344
Step 363: 4344 + 12 = 4356
Step 364: 4356 + 12 = 4368
Step 365: 4368 + 12 = 4380
Step 366: 4380 + 12 = 4392
Step 367: 4392 + 12 = 4404
Step 368: 4404 + 12 = 4416
Step 369: 4416 + 12 = 4428
Step 370: 4428 + 12 = 4440
Step 371: 4440 + 12 = 4452
Step 372: 4452 + 12 = 4464
Step 373: 4464 + 12 = 4476
Step 374: 4476 + 12 = 4488
Step 375: 4488 + 12 = 4500
Step 376: 4500 + 12 = 4512
Step 377: 4512 + 12 = 4524
Step 378: 4524 + 12 = 4536
Step 379: 4536 + 12 = 4548
Step 380: 4548 + 12 = 4560
Step 381: 4560 + 12 = 4572
Step 382: 4572 + 12 = 4584
Step 383: 4584 + 12 = 4596
Step 384: 4596 + 12 = 4608
Step 385: 4608 + 12 = 4620
Step 386: 4620 + 12 = 4632
Step 387: 4632 + 12 = 4644
Step 388: 4644 + 12 = 4656
Step 389: 4656 + 12 = 4668
Step 390: 4668 + 12 = 4680
Step 391: 4680 + 12 = 4692
Step 392: 4692 + 12 = 4704
Step 393: 4704 + 12 = 4716
Step 394: 4716 + 12 = 4728
Step 395: 4728 + 12 = 4740
Step 396: 4740 + 12 = 4752
Step 397: 4752 + 12 = 4764
Step 398: 4764 + 12 = 4776
Step 399: 4776 + 12 = 4788
Step 400: 4788 + 12 = 4800
Step 401: 4800 + 12 = 4812
Step 402: 4812 + 12 = 4824
Step 403: 4824 + 12 = 4836
Step 404: 4836 + 12 = 4848
Step 405: 4848 + 12 = 4860
Step 406: 4860 + 12 = 4872
Step 407: 4872 + 12 = 4884
Step 408: 4884 + 12 = 4896
Step 409: 4896 + 12 = 4908
Step 410: 4908 + 12 = 4920
Step 411: 4920 + 12 = 4932
Step 412: 4932 + 12 = 4944
Step 413: 4944 + 12 = 4956
Step 414: 4956 + 12 = 4968
Step 415: 4968 + 12 = 4980
Step 416: 4980 + 12 = 4992
Step 417: 4992 + 12 = 5004
Step 418: 5004 + 12 = 5016
Step 419: 5016 + 12 = 5028
Step 420: 5028 + 12 = 5040
Step 421: 5040 + 12 = 5052
Step 422: 5052 + 12 = 5064
Step 423: 5064 + 12 = 5076
Step 424: 5076 + 12 = 5088
Step 425: 5088 + 12 = 5100
Step 426: 5100 + 12 = 5112
Step 427: 5112 + 12 = 5124
Step 428: 5124 + 12 = 5136
Step 429: 5136 + 12 = 5148

So, 12*429 = 5148