Let's roll up our sleeves and solve this. We have 686 and we're going to multiply it by 479, essentially adding 686 to itself 479 times.
Step 1: 0 + 686 = 686
Step 2: 686 + 686 = 1372
Step 3: 1372 + 686 = 2058
Step 4: 2058 + 686 = 2744
Step 5: 2744 + 686 = 3430
Step 6: 3430 + 686 = 4116
Step 7: 4116 + 686 = 4802
Step 8: 4802 + 686 = 5488
Step 9: 5488 + 686 = 6174
Step 10: 6174 + 686 = 6860
Step 11: 6860 + 686 = 7546
Step 12: 7546 + 686 = 8232
Step 13: 8232 + 686 = 8918
Step 14: 8918 + 686 = 9604
Step 15: 9604 + 686 = 10290
Step 16: 10290 + 686 = 10976
Step 17: 10976 + 686 = 11662
Step 18: 11662 + 686 = 12348
Step 19: 12348 + 686 = 13034
Step 20: 13034 + 686 = 13720
Step 21: 13720 + 686 = 14406
Step 22: 14406 + 686 = 15092
Step 23: 15092 + 686 = 15778
Step 24: 15778 + 686 = 16464
Step 25: 16464 + 686 = 17150
Step 26: 17150 + 686 = 17836
Step 27: 17836 + 686 = 18522
Step 28: 18522 + 686 = 19208
Step 29: 19208 + 686 = 19894
Step 30: 19894 + 686 = 20580
Step 31: 20580 + 686 = 21266
Step 32: 21266 + 686 = 21952
Step 33: 21952 + 686 = 22638
Step 34: 22638 + 686 = 23324
Step 35: 23324 + 686 = 24010
Step 36: 24010 + 686 = 24696
Step 37: 24696 + 686 = 25382
Step 38: 25382 + 686 = 26068
Step 39: 26068 + 686 = 26754
Step 40: 26754 + 686 = 27440
Step 41: 27440 + 686 = 28126
Step 42: 28126 + 686 = 28812
Step 43: 28812 + 686 = 29498
Step 44: 29498 + 686 = 30184
Step 45: 30184 + 686 = 30870
Step 46: 30870 + 686 = 31556
Step 47: 31556 + 686 = 32242
Step 48: 32242 + 686 = 32928
Step 49: 32928 + 686 = 33614
Step 50: 33614 + 686 = 34300
Step 51: 34300 + 686 = 34986
Step 52: 34986 + 686 = 35672
Step 53: 35672 + 686 = 36358
Step 54: 36358 + 686 = 37044
Step 55: 37044 + 686 = 37730
Step 56: 37730 + 686 = 38416
Step 57: 38416 + 686 = 39102
Step 58: 39102 + 686 = 39788
Step 59: 39788 + 686 = 40474
Step 60: 40474 + 686 = 41160
Step 61: 41160 + 686 = 41846
Step 62: 41846 + 686 = 42532
Step 63: 42532 + 686 = 43218
Step 64: 43218 + 686 = 43904
Step 65: 43904 + 686 = 44590
Step 66: 44590 + 686 = 45276
Step 67: 45276 + 686 = 45962
Step 68: 45962 + 686 = 46648
Step 69: 46648 + 686 = 47334
Step 70: 47334 + 686 = 48020
Step 71: 48020 + 686 = 48706
Step 72: 48706 + 686 = 49392
Step 73: 49392 + 686 = 50078
Step 74: 50078 + 686 = 50764
Step 75: 50764 + 686 = 51450
Step 76: 51450 + 686 = 52136
Step 77: 52136 + 686 = 52822
Step 78: 52822 + 686 = 53508
Step 79: 53508 + 686 = 54194
Step 80: 54194 + 686 = 54880
Step 81: 54880 + 686 = 55566
Step 82: 55566 + 686 = 56252
Step 83: 56252 + 686 = 56938
Step 84: 56938 + 686 = 57624
Step 85: 57624 + 686 = 58310
Step 86: 58310 + 686 = 58996
Step 87: 58996 + 686 = 59682
Step 88: 59682 + 686 = 60368
Step 89: 60368 + 686 = 61054
Step 90: 61054 + 686 = 61740
Step 91: 61740 + 686 = 62426
Step 92: 62426 + 686 = 63112
Step 93: 63112 + 686 = 63798
Step 94: 63798 + 686 = 64484
Step 95: 64484 + 686 = 65170
Step 96: 65170 + 686 = 65856
Step 97: 65856 + 686 = 66542
Step 98: 66542 + 686 = 67228
Step 99: 67228 + 686 = 67914
Step 100: 67914 + 686 = 68600
Step 101: 68600 + 686 = 69286
Step 102: 69286 + 686 = 69972
Step 103: 69972 + 686 = 70658
Step 104: 70658 + 686 = 71344
Step 105: 71344 + 686 = 72030
Step 106: 72030 + 686 = 72716
Step 107: 72716 + 686 = 73402
Step 108: 73402 + 686 = 74088
Step 109: 74088 + 686 = 74774
Step 110: 74774 + 686 = 75460
Step 111: 75460 + 686 = 76146
Step 112: 76146 + 686 = 76832
Step 113: 76832 + 686 = 77518
Step 114: 77518 + 686 = 78204
Step 115: 78204 + 686 = 78890
Step 116: 78890 + 686 = 79576
Step 117: 79576 + 686 = 80262
Step 118: 80262 + 686 = 80948
Step 119: 80948 + 686 = 81634
Step 120: 81634 + 686 = 82320
Step 121: 82320 + 686 = 83006
Step 122: 83006 + 686 = 83692
Step 123: 83692 + 686 = 84378
Step 124: 84378 + 686 = 85064
Step 125: 85064 + 686 = 85750
Step 126: 85750 + 686 = 86436
Step 127: 86436 + 686 = 87122
Step 128: 87122 + 686 = 87808
Step 129: 87808 + 686 = 88494
Step 130: 88494 + 686 = 89180
Step 131: 89180 + 686 = 89866
Step 132: 89866 + 686 = 90552
Step 133: 90552 + 686 = 91238
Step 134: 91238 + 686 = 91924
Step 135: 91924 + 686 = 92610
Step 136: 92610 + 686 = 93296
Step 137: 93296 + 686 = 93982
Step 138: 93982 + 686 = 94668
Step 139: 94668 + 686 = 95354
Step 140: 95354 + 686 = 96040
Step 141: 96040 + 686 = 96726
Step 142: 96726 + 686 = 97412
Step 143: 97412 + 686 = 98098
Step 144: 98098 + 686 = 98784
Step 145: 98784 + 686 = 99470
Step 146: 99470 + 686 = 100156
Step 147: 100156 + 686 = 100842
Step 148: 100842 + 686 = 101528
Step 149: 101528 + 686 = 102214
Step 150: 102214 + 686 = 102900
Step 151: 102900 + 686 = 103586
Step 152: 103586 + 686 = 104272
Step 153: 104272 + 686 = 104958
Step 154: 104958 + 686 = 105644
Step 155: 105644 + 686 = 106330
Step 156: 106330 + 686 = 107016
Step 157: 107016 + 686 = 107702
Step 158: 107702 + 686 = 108388
Step 159: 108388 + 686 = 109074
Step 160: 109074 + 686 = 109760
Step 161: 109760 + 686 = 110446
Step 162: 110446 + 686 = 111132
Step 163: 111132 + 686 = 111818
Step 164: 111818 + 686 = 112504
Step 165: 112504 + 686 = 113190
Step 166: 113190 + 686 = 113876
Step 167: 113876 + 686 = 114562
Step 168: 114562 + 686 = 115248
Step 169: 115248 + 686 = 115934
Step 170: 115934 + 686 = 116620
Step 171: 116620 + 686 = 117306
Step 172: 117306 + 686 = 117992
Step 173: 117992 + 686 = 118678
Step 174: 118678 + 686 = 119364
Step 175: 119364 + 686 = 120050
Step 176: 120050 + 686 = 120736
Step 177: 120736 + 686 = 121422
Step 178: 121422 + 686 = 122108
Step 179: 122108 + 686 = 122794
Step 180: 122794 + 686 = 123480
Step 181: 123480 + 686 = 124166
Step 182: 124166 + 686 = 124852
Step 183: 124852 + 686 = 125538
Step 184: 125538 + 686 = 126224
Step 185: 126224 + 686 = 126910
Step 186: 126910 + 686 = 127596
Step 187: 127596 + 686 = 128282
Step 188: 128282 + 686 = 128968
Step 189: 128968 + 686 = 129654
Step 190: 129654 + 686 = 130340
Step 191: 130340 + 686 = 131026
Step 192: 131026 + 686 = 131712
Step 193: 131712 + 686 = 132398
Step 194: 132398 + 686 = 133084
Step 195: 133084 + 686 = 133770
Step 196: 133770 + 686 = 134456
Step 197: 134456 + 686 = 135142
Step 198: 135142 + 686 = 135828
Step 199: 135828 + 686 = 136514
Step 200: 136514 + 686 = 137200
Step 201: 137200 + 686 = 137886
Step 202: 137886 + 686 = 138572
Step 203: 138572 + 686 = 139258
Step 204: 139258 + 686 = 139944
Step 205: 139944 + 686 = 140630
Step 206: 140630 + 686 = 141316
Step 207: 141316 + 686 = 142002
Step 208: 142002 + 686 = 142688
Step 209: 142688 + 686 = 143374
Step 210: 143374 + 686 = 144060
Step 211: 144060 + 686 = 144746
Step 212: 144746 + 686 = 145432
Step 213: 145432 + 686 = 146118
Step 214: 146118 + 686 = 146804
Step 215: 146804 + 686 = 147490
Step 216: 147490 + 686 = 148176
Step 217: 148176 + 686 = 148862
Step 218: 148862 + 686 = 149548
Step 219: 149548 + 686 = 150234
Step 220: 150234 + 686 = 150920
Step 221: 150920 + 686 = 151606
Step 222: 151606 + 686 = 152292
Step 223: 152292 + 686 = 152978
Step 224: 152978 + 686 = 153664
Step 225: 153664 + 686 = 154350
Step 226: 154350 + 686 = 155036
Step 227: 155036 + 686 = 155722
Step 228: 155722 + 686 = 156408
Step 229: 156408 + 686 = 157094
Step 230: 157094 + 686 = 157780
Step 231: 157780 + 686 = 158466
Step 232: 158466 + 686 = 159152
Step 233: 159152 + 686 = 159838
Step 234: 159838 + 686 = 160524
Step 235: 160524 + 686 = 161210
Step 236: 161210 + 686 = 161896
Step 237: 161896 + 686 = 162582
Step 238: 162582 + 686 = 163268
Step 239: 163268 + 686 = 163954
Step 240: 163954 + 686 = 164640
Step 241: 164640 + 686 = 165326
Step 242: 165326 + 686 = 166012
Step 243: 166012 + 686 = 166698
Step 244: 166698 + 686 = 167384
Step 245: 167384 + 686 = 168070
Step 246: 168070 + 686 = 168756
Step 247: 168756 + 686 = 169442
Step 248: 169442 + 686 = 170128
Step 249: 170128 + 686 = 170814
Step 250: 170814 + 686 = 171500
Step 251: 171500 + 686 = 172186
Step 252: 172186 + 686 = 172872
Step 253: 172872 + 686 = 173558
Step 254: 173558 + 686 = 174244
Step 255: 174244 + 686 = 174930
Step 256: 174930 + 686 = 175616
Step 257: 175616 + 686 = 176302
Step 258: 176302 + 686 = 176988
Step 259: 176988 + 686 = 177674
Step 260: 177674 + 686 = 178360
Step 261: 178360 + 686 = 179046
Step 262: 179046 + 686 = 179732
Step 263: 179732 + 686 = 180418
Step 264: 180418 + 686 = 181104
Step 265: 181104 + 686 = 181790
Step 266: 181790 + 686 = 182476
Step 267: 182476 + 686 = 183162
Step 268: 183162 + 686 = 183848
Step 269: 183848 + 686 = 184534
Step 270: 184534 + 686 = 185220
Step 271: 185220 + 686 = 185906
Step 272: 185906 + 686 = 186592
Step 273: 186592 + 686 = 187278
Step 274: 187278 + 686 = 187964
Step 275: 187964 + 686 = 188650
Step 276: 188650 + 686 = 189336
Step 277: 189336 + 686 = 190022
Step 278: 190022 + 686 = 190708
Step 279: 190708 + 686 = 191394
Step 280: 191394 + 686 = 192080
Step 281: 192080 + 686 = 192766
Step 282: 192766 + 686 = 193452
Step 283: 193452 + 686 = 194138
Step 284: 194138 + 686 = 194824
Step 285: 194824 + 686 = 195510
Step 286: 195510 + 686 = 196196
Step 287: 196196 + 686 = 196882
Step 288: 196882 + 686 = 197568
Step 289: 197568 + 686 = 198254
Step 290: 198254 + 686 = 198940
Step 291: 198940 + 686 = 199626
Step 292: 199626 + 686 = 200312
Step 293: 200312 + 686 = 200998
Step 294: 200998 + 686 = 201684
Step 295: 201684 + 686 = 202370
Step 296: 202370 + 686 = 203056
Step 297: 203056 + 686 = 203742
Step 298: 203742 + 686 = 204428
Step 299: 204428 + 686 = 205114
Step 300: 205114 + 686 = 205800
Step 301: 205800 + 686 = 206486
Step 302: 206486 + 686 = 207172
Step 303: 207172 + 686 = 207858
Step 304: 207858 + 686 = 208544
Step 305: 208544 + 686 = 209230
Step 306: 209230 + 686 = 209916
Step 307: 209916 + 686 = 210602
Step 308: 210602 + 686 = 211288
Step 309: 211288 + 686 = 211974
Step 310: 211974 + 686 = 212660
Step 311: 212660 + 686 = 213346
Step 312: 213346 + 686 = 214032
Step 313: 214032 + 686 = 214718
Step 314: 214718 + 686 = 215404
Step 315: 215404 + 686 = 216090
Step 316: 216090 + 686 = 216776
Step 317: 216776 + 686 = 217462
Step 318: 217462 + 686 = 218148
Step 319: 218148 + 686 = 218834
Step 320: 218834 + 686 = 219520
Step 321: 219520 + 686 = 220206
Step 322: 220206 + 686 = 220892
Step 323: 220892 + 686 = 221578
Step 324: 221578 + 686 = 222264
Step 325: 222264 + 686 = 222950
Step 326: 222950 + 686 = 223636
Step 327: 223636 + 686 = 224322
Step 328: 224322 + 686 = 225008
Step 329: 225008 + 686 = 225694
Step 330: 225694 + 686 = 226380
Step 331: 226380 + 686 = 227066
Step 332: 227066 + 686 = 227752
Step 333: 227752 + 686 = 228438
Step 334: 228438 + 686 = 229124
Step 335: 229124 + 686 = 229810
Step 336: 229810 + 686 = 230496
Step 337: 230496 + 686 = 231182
Step 338: 231182 + 686 = 231868
Step 339: 231868 + 686 = 232554
Step 340: 232554 + 686 = 233240
Step 341: 233240 + 686 = 233926
Step 342: 233926 + 686 = 234612
Step 343: 234612 + 686 = 235298
Step 344: 235298 + 686 = 235984
Step 345: 235984 + 686 = 236670
Step 346: 236670 + 686 = 237356
Step 347: 237356 + 686 = 238042
Step 348: 238042 + 686 = 238728
Step 349: 238728 + 686 = 239414
Step 350: 239414 + 686 = 240100
Step 351: 240100 + 686 = 240786
Step 352: 240786 + 686 = 241472
Step 353: 241472 + 686 = 242158
Step 354: 242158 + 686 = 242844
Step 355: 242844 + 686 = 243530
Step 356: 243530 + 686 = 244216
Step 357: 244216 + 686 = 244902
Step 358: 244902 + 686 = 245588
Step 359: 245588 + 686 = 246274
Step 360: 246274 + 686 = 246960
Step 361: 246960 + 686 = 247646
Step 362: 247646 + 686 = 248332
Step 363: 248332 + 686 = 249018
Step 364: 249018 + 686 = 249704
Step 365: 249704 + 686 = 250390
Step 366: 250390 + 686 = 251076
Step 367: 251076 + 686 = 251762
Step 368: 251762 + 686 = 252448
Step 369: 252448 + 686 = 253134
Step 370: 253134 + 686 = 253820
Step 371: 253820 + 686 = 254506
Step 372: 254506 + 686 = 255192
Step 373: 255192 + 686 = 255878
Step 374: 255878 + 686 = 256564
Step 375: 256564 + 686 = 257250
Step 376: 257250 + 686 = 257936
Step 377: 257936 + 686 = 258622
Step 378: 258622 + 686 = 259308
Step 379: 259308 + 686 = 259994
Step 380: 259994 + 686 = 260680
Step 381: 260680 + 686 = 261366
Step 382: 261366 + 686 = 262052
Step 383: 262052 + 686 = 262738
Step 384: 262738 + 686 = 263424
Step 385: 263424 + 686 = 264110
Step 386: 264110 + 686 = 264796
Step 387: 264796 + 686 = 265482
Step 388: 265482 + 686 = 266168
Step 389: 266168 + 686 = 266854
Step 390: 266854 + 686 = 267540
Step 391: 267540 + 686 = 268226
Step 392: 268226 + 686 = 268912
Step 393: 268912 + 686 = 269598
Step 394: 269598 + 686 = 270284
Step 395: 270284 + 686 = 270970
Step 396: 270970 + 686 = 271656
Step 397: 271656 + 686 = 272342
Step 398: 272342 + 686 = 273028
Step 399: 273028 + 686 = 273714
Step 400: 273714 + 686 = 274400
Step 401: 274400 + 686 = 275086
Step 402: 275086 + 686 = 275772
Step 403: 275772 + 686 = 276458
Step 404: 276458 + 686 = 277144
Step 405: 277144 + 686 = 277830
Step 406: 277830 + 686 = 278516
Step 407: 278516 + 686 = 279202
Step 408: 279202 + 686 = 279888
Step 409: 279888 + 686 = 280574
Step 410: 280574 + 686 = 281260
Step 411: 281260 + 686 = 281946
Step 412: 281946 + 686 = 282632
Step 413: 282632 + 686 = 283318
Step 414: 283318 + 686 = 284004
Step 415: 284004 + 686 = 284690
Step 416: 284690 + 686 = 285376
Step 417: 285376 + 686 = 286062
Step 418: 286062 + 686 = 286748
Step 419: 286748 + 686 = 287434
Step 420: 287434 + 686 = 288120
Step 421: 288120 + 686 = 288806
Step 422: 288806 + 686 = 289492
Step 423: 289492 + 686 = 290178
Step 424: 290178 + 686 = 290864
Step 425: 290864 + 686 = 291550
Step 426: 291550 + 686 = 292236
Step 427: 292236 + 686 = 292922
Step 428: 292922 + 686 = 293608
Step 429: 293608 + 686 = 294294
Step 430: 294294 + 686 = 294980
Step 431: 294980 + 686 = 295666
Step 432: 295666 + 686 = 296352
Step 433: 296352 + 686 = 297038
Step 434: 297038 + 686 = 297724
Step 435: 297724 + 686 = 298410
Step 436: 298410 + 686 = 299096
Step 437: 299096 + 686 = 299782
Step 438: 299782 + 686 = 300468
Step 439: 300468 + 686 = 301154
Step 440: 301154 + 686 = 301840
Step 441: 301840 + 686 = 302526
Step 442: 302526 + 686 = 303212
Step 443: 303212 + 686 = 303898
Step 444: 303898 + 686 = 304584
Step 445: 304584 + 686 = 305270
Step 446: 305270 + 686 = 305956
Step 447: 305956 + 686 = 306642
Step 448: 306642 + 686 = 307328
Step 449: 307328 + 686 = 308014
Step 450: 308014 + 686 = 308700
Step 451: 308700 + 686 = 309386
Step 452: 309386 + 686 = 310072
Step 453: 310072 + 686 = 310758
Step 454: 310758 + 686 = 311444
Step 455: 311444 + 686 = 312130
Step 456: 312130 + 686 = 312816
Step 457: 312816 + 686 = 313502
Step 458: 313502 + 686 = 314188
Step 459: 314188 + 686 = 314874
Step 460: 314874 + 686 = 315560
Step 461: 315560 + 686 = 316246
Step 462: 316246 + 686 = 316932
Step 463: 316932 + 686 = 317618
Step 464: 317618 + 686 = 318304
Step 465: 318304 + 686 = 318990
Step 466: 318990 + 686 = 319676
Step 467: 319676 + 686 = 320362
Step 468: 320362 + 686 = 321048
Step 469: 321048 + 686 = 321734
Step 470: 321734 + 686 = 322420
Step 471: 322420 + 686 = 323106
Step 472: 323106 + 686 = 323792
Step 473: 323792 + 686 = 324478
Step 474: 324478 + 686 = 325164
Step 475: 325164 + 686 = 325850
Step 476: 325850 + 686 = 326536
Step 477: 326536 + 686 = 327222
Step 478: 327222 + 686 = 327908
Step 479: 327908 + 686 = 328594

So, 686*479 = 328594