OK, let's crack this. We're given 672 and our task is to multiply it by 478. Essentially, we'll be adding 672 to itself 478 times.
Step 1: 0 + 672 = 672
Step 2: 672 + 672 = 1344
Step 3: 1344 + 672 = 2016
Step 4: 2016 + 672 = 2688
Step 5: 2688 + 672 = 3360
Step 6: 3360 + 672 = 4032
Step 7: 4032 + 672 = 4704
Step 8: 4704 + 672 = 5376
Step 9: 5376 + 672 = 6048
Step 10: 6048 + 672 = 6720
Step 11: 6720 + 672 = 7392
Step 12: 7392 + 672 = 8064
Step 13: 8064 + 672 = 8736
Step 14: 8736 + 672 = 9408
Step 15: 9408 + 672 = 10080
Step 16: 10080 + 672 = 10752
Step 17: 10752 + 672 = 11424
Step 18: 11424 + 672 = 12096
Step 19: 12096 + 672 = 12768
Step 20: 12768 + 672 = 13440
Step 21: 13440 + 672 = 14112
Step 22: 14112 + 672 = 14784
Step 23: 14784 + 672 = 15456
Step 24: 15456 + 672 = 16128
Step 25: 16128 + 672 = 16800
Step 26: 16800 + 672 = 17472
Step 27: 17472 + 672 = 18144
Step 28: 18144 + 672 = 18816
Step 29: 18816 + 672 = 19488
Step 30: 19488 + 672 = 20160
Step 31: 20160 + 672 = 20832
Step 32: 20832 + 672 = 21504
Step 33: 21504 + 672 = 22176
Step 34: 22176 + 672 = 22848
Step 35: 22848 + 672 = 23520
Step 36: 23520 + 672 = 24192
Step 37: 24192 + 672 = 24864
Step 38: 24864 + 672 = 25536
Step 39: 25536 + 672 = 26208
Step 40: 26208 + 672 = 26880
Step 41: 26880 + 672 = 27552
Step 42: 27552 + 672 = 28224
Step 43: 28224 + 672 = 28896
Step 44: 28896 + 672 = 29568
Step 45: 29568 + 672 = 30240
Step 46: 30240 + 672 = 30912
Step 47: 30912 + 672 = 31584
Step 48: 31584 + 672 = 32256
Step 49: 32256 + 672 = 32928
Step 50: 32928 + 672 = 33600
Step 51: 33600 + 672 = 34272
Step 52: 34272 + 672 = 34944
Step 53: 34944 + 672 = 35616
Step 54: 35616 + 672 = 36288
Step 55: 36288 + 672 = 36960
Step 56: 36960 + 672 = 37632
Step 57: 37632 + 672 = 38304
Step 58: 38304 + 672 = 38976
Step 59: 38976 + 672 = 39648
Step 60: 39648 + 672 = 40320
Step 61: 40320 + 672 = 40992
Step 62: 40992 + 672 = 41664
Step 63: 41664 + 672 = 42336
Step 64: 42336 + 672 = 43008
Step 65: 43008 + 672 = 43680
Step 66: 43680 + 672 = 44352
Step 67: 44352 + 672 = 45024
Step 68: 45024 + 672 = 45696
Step 69: 45696 + 672 = 46368
Step 70: 46368 + 672 = 47040
Step 71: 47040 + 672 = 47712
Step 72: 47712 + 672 = 48384
Step 73: 48384 + 672 = 49056
Step 74: 49056 + 672 = 49728
Step 75: 49728 + 672 = 50400
Step 76: 50400 + 672 = 51072
Step 77: 51072 + 672 = 51744
Step 78: 51744 + 672 = 52416
Step 79: 52416 + 672 = 53088
Step 80: 53088 + 672 = 53760
Step 81: 53760 + 672 = 54432
Step 82: 54432 + 672 = 55104
Step 83: 55104 + 672 = 55776
Step 84: 55776 + 672 = 56448
Step 85: 56448 + 672 = 57120
Step 86: 57120 + 672 = 57792
Step 87: 57792 + 672 = 58464
Step 88: 58464 + 672 = 59136
Step 89: 59136 + 672 = 59808
Step 90: 59808 + 672 = 60480
Step 91: 60480 + 672 = 61152
Step 92: 61152 + 672 = 61824
Step 93: 61824 + 672 = 62496
Step 94: 62496 + 672 = 63168
Step 95: 63168 + 672 = 63840
Step 96: 63840 + 672 = 64512
Step 97: 64512 + 672 = 65184
Step 98: 65184 + 672 = 65856
Step 99: 65856 + 672 = 66528
Step 100: 66528 + 672 = 67200
Step 101: 67200 + 672 = 67872
Step 102: 67872 + 672 = 68544
Step 103: 68544 + 672 = 69216
Step 104: 69216 + 672 = 69888
Step 105: 69888 + 672 = 70560
Step 106: 70560 + 672 = 71232
Step 107: 71232 + 672 = 71904
Step 108: 71904 + 672 = 72576
Step 109: 72576 + 672 = 73248
Step 110: 73248 + 672 = 73920
Step 111: 73920 + 672 = 74592
Step 112: 74592 + 672 = 75264
Step 113: 75264 + 672 = 75936
Step 114: 75936 + 672 = 76608
Step 115: 76608 + 672 = 77280
Step 116: 77280 + 672 = 77952
Step 117: 77952 + 672 = 78624
Step 118: 78624 + 672 = 79296
Step 119: 79296 + 672 = 79968
Step 120: 79968 + 672 = 80640
Step 121: 80640 + 672 = 81312
Step 122: 81312 + 672 = 81984
Step 123: 81984 + 672 = 82656
Step 124: 82656 + 672 = 83328
Step 125: 83328 + 672 = 84000
Step 126: 84000 + 672 = 84672
Step 127: 84672 + 672 = 85344
Step 128: 85344 + 672 = 86016
Step 129: 86016 + 672 = 86688
Step 130: 86688 + 672 = 87360
Step 131: 87360 + 672 = 88032
Step 132: 88032 + 672 = 88704
Step 133: 88704 + 672 = 89376
Step 134: 89376 + 672 = 90048
Step 135: 90048 + 672 = 90720
Step 136: 90720 + 672 = 91392
Step 137: 91392 + 672 = 92064
Step 138: 92064 + 672 = 92736
Step 139: 92736 + 672 = 93408
Step 140: 93408 + 672 = 94080
Step 141: 94080 + 672 = 94752
Step 142: 94752 + 672 = 95424
Step 143: 95424 + 672 = 96096
Step 144: 96096 + 672 = 96768
Step 145: 96768 + 672 = 97440
Step 146: 97440 + 672 = 98112
Step 147: 98112 + 672 = 98784
Step 148: 98784 + 672 = 99456
Step 149: 99456 + 672 = 100128
Step 150: 100128 + 672 = 100800
Step 151: 100800 + 672 = 101472
Step 152: 101472 + 672 = 102144
Step 153: 102144 + 672 = 102816
Step 154: 102816 + 672 = 103488
Step 155: 103488 + 672 = 104160
Step 156: 104160 + 672 = 104832
Step 157: 104832 + 672 = 105504
Step 158: 105504 + 672 = 106176
Step 159: 106176 + 672 = 106848
Step 160: 106848 + 672 = 107520
Step 161: 107520 + 672 = 108192
Step 162: 108192 + 672 = 108864
Step 163: 108864 + 672 = 109536
Step 164: 109536 + 672 = 110208
Step 165: 110208 + 672 = 110880
Step 166: 110880 + 672 = 111552
Step 167: 111552 + 672 = 112224
Step 168: 112224 + 672 = 112896
Step 169: 112896 + 672 = 113568
Step 170: 113568 + 672 = 114240
Step 171: 114240 + 672 = 114912
Step 172: 114912 + 672 = 115584
Step 173: 115584 + 672 = 116256
Step 174: 116256 + 672 = 116928
Step 175: 116928 + 672 = 117600
Step 176: 117600 + 672 = 118272
Step 177: 118272 + 672 = 118944
Step 178: 118944 + 672 = 119616
Step 179: 119616 + 672 = 120288
Step 180: 120288 + 672 = 120960
Step 181: 120960 + 672 = 121632
Step 182: 121632 + 672 = 122304
Step 183: 122304 + 672 = 122976
Step 184: 122976 + 672 = 123648
Step 185: 123648 + 672 = 124320
Step 186: 124320 + 672 = 124992
Step 187: 124992 + 672 = 125664
Step 188: 125664 + 672 = 126336
Step 189: 126336 + 672 = 127008
Step 190: 127008 + 672 = 127680
Step 191: 127680 + 672 = 128352
Step 192: 128352 + 672 = 129024
Step 193: 129024 + 672 = 129696
Step 194: 129696 + 672 = 130368
Step 195: 130368 + 672 = 131040
Step 196: 131040 + 672 = 131712
Step 197: 131712 + 672 = 132384
Step 198: 132384 + 672 = 133056
Step 199: 133056 + 672 = 133728
Step 200: 133728 + 672 = 134400
Step 201: 134400 + 672 = 135072
Step 202: 135072 + 672 = 135744
Step 203: 135744 + 672 = 136416
Step 204: 136416 + 672 = 137088
Step 205: 137088 + 672 = 137760
Step 206: 137760 + 672 = 138432
Step 207: 138432 + 672 = 139104
Step 208: 139104 + 672 = 139776
Step 209: 139776 + 672 = 140448
Step 210: 140448 + 672 = 141120
Step 211: 141120 + 672 = 141792
Step 212: 141792 + 672 = 142464
Step 213: 142464 + 672 = 143136
Step 214: 143136 + 672 = 143808
Step 215: 143808 + 672 = 144480
Step 216: 144480 + 672 = 145152
Step 217: 145152 + 672 = 145824
Step 218: 145824 + 672 = 146496
Step 219: 146496 + 672 = 147168
Step 220: 147168 + 672 = 147840
Step 221: 147840 + 672 = 148512
Step 222: 148512 + 672 = 149184
Step 223: 149184 + 672 = 149856
Step 224: 149856 + 672 = 150528
Step 225: 150528 + 672 = 151200
Step 226: 151200 + 672 = 151872
Step 227: 151872 + 672 = 152544
Step 228: 152544 + 672 = 153216
Step 229: 153216 + 672 = 153888
Step 230: 153888 + 672 = 154560
Step 231: 154560 + 672 = 155232
Step 232: 155232 + 672 = 155904
Step 233: 155904 + 672 = 156576
Step 234: 156576 + 672 = 157248
Step 235: 157248 + 672 = 157920
Step 236: 157920 + 672 = 158592
Step 237: 158592 + 672 = 159264
Step 238: 159264 + 672 = 159936
Step 239: 159936 + 672 = 160608
Step 240: 160608 + 672 = 161280
Step 241: 161280 + 672 = 161952
Step 242: 161952 + 672 = 162624
Step 243: 162624 + 672 = 163296
Step 244: 163296 + 672 = 163968
Step 245: 163968 + 672 = 164640
Step 246: 164640 + 672 = 165312
Step 247: 165312 + 672 = 165984
Step 248: 165984 + 672 = 166656
Step 249: 166656 + 672 = 167328
Step 250: 167328 + 672 = 168000
Step 251: 168000 + 672 = 168672
Step 252: 168672 + 672 = 169344
Step 253: 169344 + 672 = 170016
Step 254: 170016 + 672 = 170688
Step 255: 170688 + 672 = 171360
Step 256: 171360 + 672 = 172032
Step 257: 172032 + 672 = 172704
Step 258: 172704 + 672 = 173376
Step 259: 173376 + 672 = 174048
Step 260: 174048 + 672 = 174720
Step 261: 174720 + 672 = 175392
Step 262: 175392 + 672 = 176064
Step 263: 176064 + 672 = 176736
Step 264: 176736 + 672 = 177408
Step 265: 177408 + 672 = 178080
Step 266: 178080 + 672 = 178752
Step 267: 178752 + 672 = 179424
Step 268: 179424 + 672 = 180096
Step 269: 180096 + 672 = 180768
Step 270: 180768 + 672 = 181440
Step 271: 181440 + 672 = 182112
Step 272: 182112 + 672 = 182784
Step 273: 182784 + 672 = 183456
Step 274: 183456 + 672 = 184128
Step 275: 184128 + 672 = 184800
Step 276: 184800 + 672 = 185472
Step 277: 185472 + 672 = 186144
Step 278: 186144 + 672 = 186816
Step 279: 186816 + 672 = 187488
Step 280: 187488 + 672 = 188160
Step 281: 188160 + 672 = 188832
Step 282: 188832 + 672 = 189504
Step 283: 189504 + 672 = 190176
Step 284: 190176 + 672 = 190848
Step 285: 190848 + 672 = 191520
Step 286: 191520 + 672 = 192192
Step 287: 192192 + 672 = 192864
Step 288: 192864 + 672 = 193536
Step 289: 193536 + 672 = 194208
Step 290: 194208 + 672 = 194880
Step 291: 194880 + 672 = 195552
Step 292: 195552 + 672 = 196224
Step 293: 196224 + 672 = 196896
Step 294: 196896 + 672 = 197568
Step 295: 197568 + 672 = 198240
Step 296: 198240 + 672 = 198912
Step 297: 198912 + 672 = 199584
Step 298: 199584 + 672 = 200256
Step 299: 200256 + 672 = 200928
Step 300: 200928 + 672 = 201600
Step 301: 201600 + 672 = 202272
Step 302: 202272 + 672 = 202944
Step 303: 202944 + 672 = 203616
Step 304: 203616 + 672 = 204288
Step 305: 204288 + 672 = 204960
Step 306: 204960 + 672 = 205632
Step 307: 205632 + 672 = 206304
Step 308: 206304 + 672 = 206976
Step 309: 206976 + 672 = 207648
Step 310: 207648 + 672 = 208320
Step 311: 208320 + 672 = 208992
Step 312: 208992 + 672 = 209664
Step 313: 209664 + 672 = 210336
Step 314: 210336 + 672 = 211008
Step 315: 211008 + 672 = 211680
Step 316: 211680 + 672 = 212352
Step 317: 212352 + 672 = 213024
Step 318: 213024 + 672 = 213696
Step 319: 213696 + 672 = 214368
Step 320: 214368 + 672 = 215040
Step 321: 215040 + 672 = 215712
Step 322: 215712 + 672 = 216384
Step 323: 216384 + 672 = 217056
Step 324: 217056 + 672 = 217728
Step 325: 217728 + 672 = 218400
Step 326: 218400 + 672 = 219072
Step 327: 219072 + 672 = 219744
Step 328: 219744 + 672 = 220416
Step 329: 220416 + 672 = 221088
Step 330: 221088 + 672 = 221760
Step 331: 221760 + 672 = 222432
Step 332: 222432 + 672 = 223104
Step 333: 223104 + 672 = 223776
Step 334: 223776 + 672 = 224448
Step 335: 224448 + 672 = 225120
Step 336: 225120 + 672 = 225792
Step 337: 225792 + 672 = 226464
Step 338: 226464 + 672 = 227136
Step 339: 227136 + 672 = 227808
Step 340: 227808 + 672 = 228480
Step 341: 228480 + 672 = 229152
Step 342: 229152 + 672 = 229824
Step 343: 229824 + 672 = 230496
Step 344: 230496 + 672 = 231168
Step 345: 231168 + 672 = 231840
Step 346: 231840 + 672 = 232512
Step 347: 232512 + 672 = 233184
Step 348: 233184 + 672 = 233856
Step 349: 233856 + 672 = 234528
Step 350: 234528 + 672 = 235200
Step 351: 235200 + 672 = 235872
Step 352: 235872 + 672 = 236544
Step 353: 236544 + 672 = 237216
Step 354: 237216 + 672 = 237888
Step 355: 237888 + 672 = 238560
Step 356: 238560 + 672 = 239232
Step 357: 239232 + 672 = 239904
Step 358: 239904 + 672 = 240576
Step 359: 240576 + 672 = 241248
Step 360: 241248 + 672 = 241920
Step 361: 241920 + 672 = 242592
Step 362: 242592 + 672 = 243264
Step 363: 243264 + 672 = 243936
Step 364: 243936 + 672 = 244608
Step 365: 244608 + 672 = 245280
Step 366: 245280 + 672 = 245952
Step 367: 245952 + 672 = 246624
Step 368: 246624 + 672 = 247296
Step 369: 247296 + 672 = 247968
Step 370: 247968 + 672 = 248640
Step 371: 248640 + 672 = 249312
Step 372: 249312 + 672 = 249984
Step 373: 249984 + 672 = 250656
Step 374: 250656 + 672 = 251328
Step 375: 251328 + 672 = 252000
Step 376: 252000 + 672 = 252672
Step 377: 252672 + 672 = 253344
Step 378: 253344 + 672 = 254016
Step 379: 254016 + 672 = 254688
Step 380: 254688 + 672 = 255360
Step 381: 255360 + 672 = 256032
Step 382: 256032 + 672 = 256704
Step 383: 256704 + 672 = 257376
Step 384: 257376 + 672 = 258048
Step 385: 258048 + 672 = 258720
Step 386: 258720 + 672 = 259392
Step 387: 259392 + 672 = 260064
Step 388: 260064 + 672 = 260736
Step 389: 260736 + 672 = 261408
Step 390: 261408 + 672 = 262080
Step 391: 262080 + 672 = 262752
Step 392: 262752 + 672 = 263424
Step 393: 263424 + 672 = 264096
Step 394: 264096 + 672 = 264768
Step 395: 264768 + 672 = 265440
Step 396: 265440 + 672 = 266112
Step 397: 266112 + 672 = 266784
Step 398: 266784 + 672 = 267456
Step 399: 267456 + 672 = 268128
Step 400: 268128 + 672 = 268800
Step 401: 268800 + 672 = 269472
Step 402: 269472 + 672 = 270144
Step 403: 270144 + 672 = 270816
Step 404: 270816 + 672 = 271488
Step 405: 271488 + 672 = 272160
Step 406: 272160 + 672 = 272832
Step 407: 272832 + 672 = 273504
Step 408: 273504 + 672 = 274176
Step 409: 274176 + 672 = 274848
Step 410: 274848 + 672 = 275520
Step 411: 275520 + 672 = 276192
Step 412: 276192 + 672 = 276864
Step 413: 276864 + 672 = 277536
Step 414: 277536 + 672 = 278208
Step 415: 278208 + 672 = 278880
Step 416: 278880 + 672 = 279552
Step 417: 279552 + 672 = 280224
Step 418: 280224 + 672 = 280896
Step 419: 280896 + 672 = 281568
Step 420: 281568 + 672 = 282240
Step 421: 282240 + 672 = 282912
Step 422: 282912 + 672 = 283584
Step 423: 283584 + 672 = 284256
Step 424: 284256 + 672 = 284928
Step 425: 284928 + 672 = 285600
Step 426: 285600 + 672 = 286272
Step 427: 286272 + 672 = 286944
Step 428: 286944 + 672 = 287616
Step 429: 287616 + 672 = 288288
Step 430: 288288 + 672 = 288960
Step 431: 288960 + 672 = 289632
Step 432: 289632 + 672 = 290304
Step 433: 290304 + 672 = 290976
Step 434: 290976 + 672 = 291648
Step 435: 291648 + 672 = 292320
Step 436: 292320 + 672 = 292992
Step 437: 292992 + 672 = 293664
Step 438: 293664 + 672 = 294336
Step 439: 294336 + 672 = 295008
Step 440: 295008 + 672 = 295680
Step 441: 295680 + 672 = 296352
Step 442: 296352 + 672 = 297024
Step 443: 297024 + 672 = 297696
Step 444: 297696 + 672 = 298368
Step 445: 298368 + 672 = 299040
Step 446: 299040 + 672 = 299712
Step 447: 299712 + 672 = 300384
Step 448: 300384 + 672 = 301056
Step 449: 301056 + 672 = 301728
Step 450: 301728 + 672 = 302400
Step 451: 302400 + 672 = 303072
Step 452: 303072 + 672 = 303744
Step 453: 303744 + 672 = 304416
Step 454: 304416 + 672 = 305088
Step 455: 305088 + 672 = 305760
Step 456: 305760 + 672 = 306432
Step 457: 306432 + 672 = 307104
Step 458: 307104 + 672 = 307776
Step 459: 307776 + 672 = 308448
Step 460: 308448 + 672 = 309120
Step 461: 309120 + 672 = 309792
Step 462: 309792 + 672 = 310464
Step 463: 310464 + 672 = 311136
Step 464: 311136 + 672 = 311808
Step 465: 311808 + 672 = 312480
Step 466: 312480 + 672 = 313152
Step 467: 313152 + 672 = 313824
Step 468: 313824 + 672 = 314496
Step 469: 314496 + 672 = 315168
Step 470: 315168 + 672 = 315840
Step 471: 315840 + 672 = 316512
Step 472: 316512 + 672 = 317184
Step 473: 317184 + 672 = 317856
Step 474: 317856 + 672 = 318528
Step 475: 318528 + 672 = 319200
Step 476: 319200 + 672 = 319872
Step 477: 319872 + 672 = 320544
Step 478: 320544 + 672 = 321216

So, 672*478 = 321216