OK, let's crack this. We're given 18 and our task is to multiply it by 407. Essentially, we'll be adding 18 to itself 407 times.
Step 1: 0 + 18 = 18
Step 2: 18 + 18 = 36
Step 3: 36 + 18 = 54
Step 4: 54 + 18 = 72
Step 5: 72 + 18 = 90
Step 6: 90 + 18 = 108
Step 7: 108 + 18 = 126
Step 8: 126 + 18 = 144
Step 9: 144 + 18 = 162
Step 10: 162 + 18 = 180
Step 11: 180 + 18 = 198
Step 12: 198 + 18 = 216
Step 13: 216 + 18 = 234
Step 14: 234 + 18 = 252
Step 15: 252 + 18 = 270
Step 16: 270 + 18 = 288
Step 17: 288 + 18 = 306
Step 18: 306 + 18 = 324
Step 19: 324 + 18 = 342
Step 20: 342 + 18 = 360
Step 21: 360 + 18 = 378
Step 22: 378 + 18 = 396
Step 23: 396 + 18 = 414
Step 24: 414 + 18 = 432
Step 25: 432 + 18 = 450
Step 26: 450 + 18 = 468
Step 27: 468 + 18 = 486
Step 28: 486 + 18 = 504
Step 29: 504 + 18 = 522
Step 30: 522 + 18 = 540
Step 31: 540 + 18 = 558
Step 32: 558 + 18 = 576
Step 33: 576 + 18 = 594
Step 34: 594 + 18 = 612
Step 35: 612 + 18 = 630
Step 36: 630 + 18 = 648
Step 37: 648 + 18 = 666
Step 38: 666 + 18 = 684
Step 39: 684 + 18 = 702
Step 40: 702 + 18 = 720
Step 41: 720 + 18 = 738
Step 42: 738 + 18 = 756
Step 43: 756 + 18 = 774
Step 44: 774 + 18 = 792
Step 45: 792 + 18 = 810
Step 46: 810 + 18 = 828
Step 47: 828 + 18 = 846
Step 48: 846 + 18 = 864
Step 49: 864 + 18 = 882
Step 50: 882 + 18 = 900
Step 51: 900 + 18 = 918
Step 52: 918 + 18 = 936
Step 53: 936 + 18 = 954
Step 54: 954 + 18 = 972
Step 55: 972 + 18 = 990
Step 56: 990 + 18 = 1008
Step 57: 1008 + 18 = 1026
Step 58: 1026 + 18 = 1044
Step 59: 1044 + 18 = 1062
Step 60: 1062 + 18 = 1080
Step 61: 1080 + 18 = 1098
Step 62: 1098 + 18 = 1116
Step 63: 1116 + 18 = 1134
Step 64: 1134 + 18 = 1152
Step 65: 1152 + 18 = 1170
Step 66: 1170 + 18 = 1188
Step 67: 1188 + 18 = 1206
Step 68: 1206 + 18 = 1224
Step 69: 1224 + 18 = 1242
Step 70: 1242 + 18 = 1260
Step 71: 1260 + 18 = 1278
Step 72: 1278 + 18 = 1296
Step 73: 1296 + 18 = 1314
Step 74: 1314 + 18 = 1332
Step 75: 1332 + 18 = 1350
Step 76: 1350 + 18 = 1368
Step 77: 1368 + 18 = 1386
Step 78: 1386 + 18 = 1404
Step 79: 1404 + 18 = 1422
Step 80: 1422 + 18 = 1440
Step 81: 1440 + 18 = 1458
Step 82: 1458 + 18 = 1476
Step 83: 1476 + 18 = 1494
Step 84: 1494 + 18 = 1512
Step 85: 1512 + 18 = 1530
Step 86: 1530 + 18 = 1548
Step 87: 1548 + 18 = 1566
Step 88: 1566 + 18 = 1584
Step 89: 1584 + 18 = 1602
Step 90: 1602 + 18 = 1620
Step 91: 1620 + 18 = 1638
Step 92: 1638 + 18 = 1656
Step 93: 1656 + 18 = 1674
Step 94: 1674 + 18 = 1692
Step 95: 1692 + 18 = 1710
Step 96: 1710 + 18 = 1728
Step 97: 1728 + 18 = 1746
Step 98: 1746 + 18 = 1764
Step 99: 1764 + 18 = 1782
Step 100: 1782 + 18 = 1800
Step 101: 1800 + 18 = 1818
Step 102: 1818 + 18 = 1836
Step 103: 1836 + 18 = 1854
Step 104: 1854 + 18 = 1872
Step 105: 1872 + 18 = 1890
Step 106: 1890 + 18 = 1908
Step 107: 1908 + 18 = 1926
Step 108: 1926 + 18 = 1944
Step 109: 1944 + 18 = 1962
Step 110: 1962 + 18 = 1980
Step 111: 1980 + 18 = 1998
Step 112: 1998 + 18 = 2016
Step 113: 2016 + 18 = 2034
Step 114: 2034 + 18 = 2052
Step 115: 2052 + 18 = 2070
Step 116: 2070 + 18 = 2088
Step 117: 2088 + 18 = 2106
Step 118: 2106 + 18 = 2124
Step 119: 2124 + 18 = 2142
Step 120: 2142 + 18 = 2160
Step 121: 2160 + 18 = 2178
Step 122: 2178 + 18 = 2196
Step 123: 2196 + 18 = 2214
Step 124: 2214 + 18 = 2232
Step 125: 2232 + 18 = 2250
Step 126: 2250 + 18 = 2268
Step 127: 2268 + 18 = 2286
Step 128: 2286 + 18 = 2304
Step 129: 2304 + 18 = 2322
Step 130: 2322 + 18 = 2340
Step 131: 2340 + 18 = 2358
Step 132: 2358 + 18 = 2376
Step 133: 2376 + 18 = 2394
Step 134: 2394 + 18 = 2412
Step 135: 2412 + 18 = 2430
Step 136: 2430 + 18 = 2448
Step 137: 2448 + 18 = 2466
Step 138: 2466 + 18 = 2484
Step 139: 2484 + 18 = 2502
Step 140: 2502 + 18 = 2520
Step 141: 2520 + 18 = 2538
Step 142: 2538 + 18 = 2556
Step 143: 2556 + 18 = 2574
Step 144: 2574 + 18 = 2592
Step 145: 2592 + 18 = 2610
Step 146: 2610 + 18 = 2628
Step 147: 2628 + 18 = 2646
Step 148: 2646 + 18 = 2664
Step 149: 2664 + 18 = 2682
Step 150: 2682 + 18 = 2700
Step 151: 2700 + 18 = 2718
Step 152: 2718 + 18 = 2736
Step 153: 2736 + 18 = 2754
Step 154: 2754 + 18 = 2772
Step 155: 2772 + 18 = 2790
Step 156: 2790 + 18 = 2808
Step 157: 2808 + 18 = 2826
Step 158: 2826 + 18 = 2844
Step 159: 2844 + 18 = 2862
Step 160: 2862 + 18 = 2880
Step 161: 2880 + 18 = 2898
Step 162: 2898 + 18 = 2916
Step 163: 2916 + 18 = 2934
Step 164: 2934 + 18 = 2952
Step 165: 2952 + 18 = 2970
Step 166: 2970 + 18 = 2988
Step 167: 2988 + 18 = 3006
Step 168: 3006 + 18 = 3024
Step 169: 3024 + 18 = 3042
Step 170: 3042 + 18 = 3060
Step 171: 3060 + 18 = 3078
Step 172: 3078 + 18 = 3096
Step 173: 3096 + 18 = 3114
Step 174: 3114 + 18 = 3132
Step 175: 3132 + 18 = 3150
Step 176: 3150 + 18 = 3168
Step 177: 3168 + 18 = 3186
Step 178: 3186 + 18 = 3204
Step 179: 3204 + 18 = 3222
Step 180: 3222 + 18 = 3240
Step 181: 3240 + 18 = 3258
Step 182: 3258 + 18 = 3276
Step 183: 3276 + 18 = 3294
Step 184: 3294 + 18 = 3312
Step 185: 3312 + 18 = 3330
Step 186: 3330 + 18 = 3348
Step 187: 3348 + 18 = 3366
Step 188: 3366 + 18 = 3384
Step 189: 3384 + 18 = 3402
Step 190: 3402 + 18 = 3420
Step 191: 3420 + 18 = 3438
Step 192: 3438 + 18 = 3456
Step 193: 3456 + 18 = 3474
Step 194: 3474 + 18 = 3492
Step 195: 3492 + 18 = 3510
Step 196: 3510 + 18 = 3528
Step 197: 3528 + 18 = 3546
Step 198: 3546 + 18 = 3564
Step 199: 3564 + 18 = 3582
Step 200: 3582 + 18 = 3600
Step 201: 3600 + 18 = 3618
Step 202: 3618 + 18 = 3636
Step 203: 3636 + 18 = 3654
Step 204: 3654 + 18 = 3672
Step 205: 3672 + 18 = 3690
Step 206: 3690 + 18 = 3708
Step 207: 3708 + 18 = 3726
Step 208: 3726 + 18 = 3744
Step 209: 3744 + 18 = 3762
Step 210: 3762 + 18 = 3780
Step 211: 3780 + 18 = 3798
Step 212: 3798 + 18 = 3816
Step 213: 3816 + 18 = 3834
Step 214: 3834 + 18 = 3852
Step 215: 3852 + 18 = 3870
Step 216: 3870 + 18 = 3888
Step 217: 3888 + 18 = 3906
Step 218: 3906 + 18 = 3924
Step 219: 3924 + 18 = 3942
Step 220: 3942 + 18 = 3960
Step 221: 3960 + 18 = 3978
Step 222: 3978 + 18 = 3996
Step 223: 3996 + 18 = 4014
Step 224: 4014 + 18 = 4032
Step 225: 4032 + 18 = 4050
Step 226: 4050 + 18 = 4068
Step 227: 4068 + 18 = 4086
Step 228: 4086 + 18 = 4104
Step 229: 4104 + 18 = 4122
Step 230: 4122 + 18 = 4140
Step 231: 4140 + 18 = 4158
Step 232: 4158 + 18 = 4176
Step 233: 4176 + 18 = 4194
Step 234: 4194 + 18 = 4212
Step 235: 4212 + 18 = 4230
Step 236: 4230 + 18 = 4248
Step 237: 4248 + 18 = 4266
Step 238: 4266 + 18 = 4284
Step 239: 4284 + 18 = 4302
Step 240: 4302 + 18 = 4320
Step 241: 4320 + 18 = 4338
Step 242: 4338 + 18 = 4356
Step 243: 4356 + 18 = 4374
Step 244: 4374 + 18 = 4392
Step 245: 4392 + 18 = 4410
Step 246: 4410 + 18 = 4428
Step 247: 4428 + 18 = 4446
Step 248: 4446 + 18 = 4464
Step 249: 4464 + 18 = 4482
Step 250: 4482 + 18 = 4500
Step 251: 4500 + 18 = 4518
Step 252: 4518 + 18 = 4536
Step 253: 4536 + 18 = 4554
Step 254: 4554 + 18 = 4572
Step 255: 4572 + 18 = 4590
Step 256: 4590 + 18 = 4608
Step 257: 4608 + 18 = 4626
Step 258: 4626 + 18 = 4644
Step 259: 4644 + 18 = 4662
Step 260: 4662 + 18 = 4680
Step 261: 4680 + 18 = 4698
Step 262: 4698 + 18 = 4716
Step 263: 4716 + 18 = 4734
Step 264: 4734 + 18 = 4752
Step 265: 4752 + 18 = 4770
Step 266: 4770 + 18 = 4788
Step 267: 4788 + 18 = 4806
Step 268: 4806 + 18 = 4824
Step 269: 4824 + 18 = 4842
Step 270: 4842 + 18 = 4860
Step 271: 4860 + 18 = 4878
Step 272: 4878 + 18 = 4896
Step 273: 4896 + 18 = 4914
Step 274: 4914 + 18 = 4932
Step 275: 4932 + 18 = 4950
Step 276: 4950 + 18 = 4968
Step 277: 4968 + 18 = 4986
Step 278: 4986 + 18 = 5004
Step 279: 5004 + 18 = 5022
Step 280: 5022 + 18 = 5040
Step 281: 5040 + 18 = 5058
Step 282: 5058 + 18 = 5076
Step 283: 5076 + 18 = 5094
Step 284: 5094 + 18 = 5112
Step 285: 5112 + 18 = 5130
Step 286: 5130 + 18 = 5148
Step 287: 5148 + 18 = 5166
Step 288: 5166 + 18 = 5184
Step 289: 5184 + 18 = 5202
Step 290: 5202 + 18 = 5220
Step 291: 5220 + 18 = 5238
Step 292: 5238 + 18 = 5256
Step 293: 5256 + 18 = 5274
Step 294: 5274 + 18 = 5292
Step 295: 5292 + 18 = 5310
Step 296: 5310 + 18 = 5328
Step 297: 5328 + 18 = 5346
Step 298: 5346 + 18 = 5364
Step 299: 5364 + 18 = 5382
Step 300: 5382 + 18 = 5400
Step 301: 5400 + 18 = 5418
Step 302: 5418 + 18 = 5436
Step 303: 5436 + 18 = 5454
Step 304: 5454 + 18 = 5472
Step 305: 5472 + 18 = 5490
Step 306: 5490 + 18 = 5508
Step 307: 5508 + 18 = 5526
Step 308: 5526 + 18 = 5544
Step 309: 5544 + 18 = 5562
Step 310: 5562 + 18 = 5580
Step 311: 5580 + 18 = 5598
Step 312: 5598 + 18 = 5616
Step 313: 5616 + 18 = 5634
Step 314: 5634 + 18 = 5652
Step 315: 5652 + 18 = 5670
Step 316: 5670 + 18 = 5688
Step 317: 5688 + 18 = 5706
Step 318: 5706 + 18 = 5724
Step 319: 5724 + 18 = 5742
Step 320: 5742 + 18 = 5760
Step 321: 5760 + 18 = 5778
Step 322: 5778 + 18 = 5796
Step 323: 5796 + 18 = 5814
Step 324: 5814 + 18 = 5832
Step 325: 5832 + 18 = 5850
Step 326: 5850 + 18 = 5868
Step 327: 5868 + 18 = 5886
Step 328: 5886 + 18 = 5904
Step 329: 5904 + 18 = 5922
Step 330: 5922 + 18 = 5940
Step 331: 5940 + 18 = 5958
Step 332: 5958 + 18 = 5976
Step 333: 5976 + 18 = 5994
Step 334: 5994 + 18 = 6012
Step 335: 6012 + 18 = 6030
Step 336: 6030 + 18 = 6048
Step 337: 6048 + 18 = 6066
Step 338: 6066 + 18 = 6084
Step 339: 6084 + 18 = 6102
Step 340: 6102 + 18 = 6120
Step 341: 6120 + 18 = 6138
Step 342: 6138 + 18 = 6156
Step 343: 6156 + 18 = 6174
Step 344: 6174 + 18 = 6192
Step 345: 6192 + 18 = 6210
Step 346: 6210 + 18 = 6228
Step 347: 6228 + 18 = 6246
Step 348: 6246 + 18 = 6264
Step 349: 6264 + 18 = 6282
Step 350: 6282 + 18 = 6300
Step 351: 6300 + 18 = 6318
Step 352: 6318 + 18 = 6336
Step 353: 6336 + 18 = 6354
Step 354: 6354 + 18 = 6372
Step 355: 6372 + 18 = 6390
Step 356: 6390 + 18 = 6408
Step 357: 6408 + 18 = 6426
Step 358: 6426 + 18 = 6444
Step 359: 6444 + 18 = 6462
Step 360: 6462 + 18 = 6480
Step 361: 6480 + 18 = 6498
Step 362: 6498 + 18 = 6516
Step 363: 6516 + 18 = 6534
Step 364: 6534 + 18 = 6552
Step 365: 6552 + 18 = 6570
Step 366: 6570 + 18 = 6588
Step 367: 6588 + 18 = 6606
Step 368: 6606 + 18 = 6624
Step 369: 6624 + 18 = 6642
Step 370: 6642 + 18 = 6660
Step 371: 6660 + 18 = 6678
Step 372: 6678 + 18 = 6696
Step 373: 6696 + 18 = 6714
Step 374: 6714 + 18 = 6732
Step 375: 6732 + 18 = 6750
Step 376: 6750 + 18 = 6768
Step 377: 6768 + 18 = 6786
Step 378: 6786 + 18 = 6804
Step 379: 6804 + 18 = 6822
Step 380: 6822 + 18 = 6840
Step 381: 6840 + 18 = 6858
Step 382: 6858 + 18 = 6876
Step 383: 6876 + 18 = 6894
Step 384: 6894 + 18 = 6912
Step 385: 6912 + 18 = 6930
Step 386: 6930 + 18 = 6948
Step 387: 6948 + 18 = 6966
Step 388: 6966 + 18 = 6984
Step 389: 6984 + 18 = 7002
Step 390: 7002 + 18 = 7020
Step 391: 7020 + 18 = 7038
Step 392: 7038 + 18 = 7056
Step 393: 7056 + 18 = 7074
Step 394: 7074 + 18 = 7092
Step 395: 7092 + 18 = 7110
Step 396: 7110 + 18 = 7128
Step 397: 7128 + 18 = 7146
Step 398: 7146 + 18 = 7164
Step 399: 7164 + 18 = 7182
Step 400: 7182 + 18 = 7200
Step 401: 7200 + 18 = 7218
Step 402: 7218 + 18 = 7236
Step 403: 7236 + 18 = 7254
Step 404: 7254 + 18 = 7272
Step 405: 7272 + 18 = 7290
Step 406: 7290 + 18 = 7308
Step 407: 7308 + 18 = 7326

So, 18*407 = 7326