Let's roll up our sleeves and solve this. We have 630 and we're going to multiply it by 455, essentially adding 630 to itself 455 times.
Step 1: 0 + 630 = 630
Step 2: 630 + 630 = 1260
Step 3: 1260 + 630 = 1890
Step 4: 1890 + 630 = 2520
Step 5: 2520 + 630 = 3150
Step 6: 3150 + 630 = 3780
Step 7: 3780 + 630 = 4410
Step 8: 4410 + 630 = 5040
Step 9: 5040 + 630 = 5670
Step 10: 5670 + 630 = 6300
Step 11: 6300 + 630 = 6930
Step 12: 6930 + 630 = 7560
Step 13: 7560 + 630 = 8190
Step 14: 8190 + 630 = 8820
Step 15: 8820 + 630 = 9450
Step 16: 9450 + 630 = 10080
Step 17: 10080 + 630 = 10710
Step 18: 10710 + 630 = 11340
Step 19: 11340 + 630 = 11970
Step 20: 11970 + 630 = 12600
Step 21: 12600 + 630 = 13230
Step 22: 13230 + 630 = 13860
Step 23: 13860 + 630 = 14490
Step 24: 14490 + 630 = 15120
Step 25: 15120 + 630 = 15750
Step 26: 15750 + 630 = 16380
Step 27: 16380 + 630 = 17010
Step 28: 17010 + 630 = 17640
Step 29: 17640 + 630 = 18270
Step 30: 18270 + 630 = 18900
Step 31: 18900 + 630 = 19530
Step 32: 19530 + 630 = 20160
Step 33: 20160 + 630 = 20790
Step 34: 20790 + 630 = 21420
Step 35: 21420 + 630 = 22050
Step 36: 22050 + 630 = 22680
Step 37: 22680 + 630 = 23310
Step 38: 23310 + 630 = 23940
Step 39: 23940 + 630 = 24570
Step 40: 24570 + 630 = 25200
Step 41: 25200 + 630 = 25830
Step 42: 25830 + 630 = 26460
Step 43: 26460 + 630 = 27090
Step 44: 27090 + 630 = 27720
Step 45: 27720 + 630 = 28350
Step 46: 28350 + 630 = 28980
Step 47: 28980 + 630 = 29610
Step 48: 29610 + 630 = 30240
Step 49: 30240 + 630 = 30870
Step 50: 30870 + 630 = 31500
Step 51: 31500 + 630 = 32130
Step 52: 32130 + 630 = 32760
Step 53: 32760 + 630 = 33390
Step 54: 33390 + 630 = 34020
Step 55: 34020 + 630 = 34650
Step 56: 34650 + 630 = 35280
Step 57: 35280 + 630 = 35910
Step 58: 35910 + 630 = 36540
Step 59: 36540 + 630 = 37170
Step 60: 37170 + 630 = 37800
Step 61: 37800 + 630 = 38430
Step 62: 38430 + 630 = 39060
Step 63: 39060 + 630 = 39690
Step 64: 39690 + 630 = 40320
Step 65: 40320 + 630 = 40950
Step 66: 40950 + 630 = 41580
Step 67: 41580 + 630 = 42210
Step 68: 42210 + 630 = 42840
Step 69: 42840 + 630 = 43470
Step 70: 43470 + 630 = 44100
Step 71: 44100 + 630 = 44730
Step 72: 44730 + 630 = 45360
Step 73: 45360 + 630 = 45990
Step 74: 45990 + 630 = 46620
Step 75: 46620 + 630 = 47250
Step 76: 47250 + 630 = 47880
Step 77: 47880 + 630 = 48510
Step 78: 48510 + 630 = 49140
Step 79: 49140 + 630 = 49770
Step 80: 49770 + 630 = 50400
Step 81: 50400 + 630 = 51030
Step 82: 51030 + 630 = 51660
Step 83: 51660 + 630 = 52290
Step 84: 52290 + 630 = 52920
Step 85: 52920 + 630 = 53550
Step 86: 53550 + 630 = 54180
Step 87: 54180 + 630 = 54810
Step 88: 54810 + 630 = 55440
Step 89: 55440 + 630 = 56070
Step 90: 56070 + 630 = 56700
Step 91: 56700 + 630 = 57330
Step 92: 57330 + 630 = 57960
Step 93: 57960 + 630 = 58590
Step 94: 58590 + 630 = 59220
Step 95: 59220 + 630 = 59850
Step 96: 59850 + 630 = 60480
Step 97: 60480 + 630 = 61110
Step 98: 61110 + 630 = 61740
Step 99: 61740 + 630 = 62370
Step 100: 62370 + 630 = 63000
Step 101: 63000 + 630 = 63630
Step 102: 63630 + 630 = 64260
Step 103: 64260 + 630 = 64890
Step 104: 64890 + 630 = 65520
Step 105: 65520 + 630 = 66150
Step 106: 66150 + 630 = 66780
Step 107: 66780 + 630 = 67410
Step 108: 67410 + 630 = 68040
Step 109: 68040 + 630 = 68670
Step 110: 68670 + 630 = 69300
Step 111: 69300 + 630 = 69930
Step 112: 69930 + 630 = 70560
Step 113: 70560 + 630 = 71190
Step 114: 71190 + 630 = 71820
Step 115: 71820 + 630 = 72450
Step 116: 72450 + 630 = 73080
Step 117: 73080 + 630 = 73710
Step 118: 73710 + 630 = 74340
Step 119: 74340 + 630 = 74970
Step 120: 74970 + 630 = 75600
Step 121: 75600 + 630 = 76230
Step 122: 76230 + 630 = 76860
Step 123: 76860 + 630 = 77490
Step 124: 77490 + 630 = 78120
Step 125: 78120 + 630 = 78750
Step 126: 78750 + 630 = 79380
Step 127: 79380 + 630 = 80010
Step 128: 80010 + 630 = 80640
Step 129: 80640 + 630 = 81270
Step 130: 81270 + 630 = 81900
Step 131: 81900 + 630 = 82530
Step 132: 82530 + 630 = 83160
Step 133: 83160 + 630 = 83790
Step 134: 83790 + 630 = 84420
Step 135: 84420 + 630 = 85050
Step 136: 85050 + 630 = 85680
Step 137: 85680 + 630 = 86310
Step 138: 86310 + 630 = 86940
Step 139: 86940 + 630 = 87570
Step 140: 87570 + 630 = 88200
Step 141: 88200 + 630 = 88830
Step 142: 88830 + 630 = 89460
Step 143: 89460 + 630 = 90090
Step 144: 90090 + 630 = 90720
Step 145: 90720 + 630 = 91350
Step 146: 91350 + 630 = 91980
Step 147: 91980 + 630 = 92610
Step 148: 92610 + 630 = 93240
Step 149: 93240 + 630 = 93870
Step 150: 93870 + 630 = 94500
Step 151: 94500 + 630 = 95130
Step 152: 95130 + 630 = 95760
Step 153: 95760 + 630 = 96390
Step 154: 96390 + 630 = 97020
Step 155: 97020 + 630 = 97650
Step 156: 97650 + 630 = 98280
Step 157: 98280 + 630 = 98910
Step 158: 98910 + 630 = 99540
Step 159: 99540 + 630 = 100170
Step 160: 100170 + 630 = 100800
Step 161: 100800 + 630 = 101430
Step 162: 101430 + 630 = 102060
Step 163: 102060 + 630 = 102690
Step 164: 102690 + 630 = 103320
Step 165: 103320 + 630 = 103950
Step 166: 103950 + 630 = 104580
Step 167: 104580 + 630 = 105210
Step 168: 105210 + 630 = 105840
Step 169: 105840 + 630 = 106470
Step 170: 106470 + 630 = 107100
Step 171: 107100 + 630 = 107730
Step 172: 107730 + 630 = 108360
Step 173: 108360 + 630 = 108990
Step 174: 108990 + 630 = 109620
Step 175: 109620 + 630 = 110250
Step 176: 110250 + 630 = 110880
Step 177: 110880 + 630 = 111510
Step 178: 111510 + 630 = 112140
Step 179: 112140 + 630 = 112770
Step 180: 112770 + 630 = 113400
Step 181: 113400 + 630 = 114030
Step 182: 114030 + 630 = 114660
Step 183: 114660 + 630 = 115290
Step 184: 115290 + 630 = 115920
Step 185: 115920 + 630 = 116550
Step 186: 116550 + 630 = 117180
Step 187: 117180 + 630 = 117810
Step 188: 117810 + 630 = 118440
Step 189: 118440 + 630 = 119070
Step 190: 119070 + 630 = 119700
Step 191: 119700 + 630 = 120330
Step 192: 120330 + 630 = 120960
Step 193: 120960 + 630 = 121590
Step 194: 121590 + 630 = 122220
Step 195: 122220 + 630 = 122850
Step 196: 122850 + 630 = 123480
Step 197: 123480 + 630 = 124110
Step 198: 124110 + 630 = 124740
Step 199: 124740 + 630 = 125370
Step 200: 125370 + 630 = 126000
Step 201: 126000 + 630 = 126630
Step 202: 126630 + 630 = 127260
Step 203: 127260 + 630 = 127890
Step 204: 127890 + 630 = 128520
Step 205: 128520 + 630 = 129150
Step 206: 129150 + 630 = 129780
Step 207: 129780 + 630 = 130410
Step 208: 130410 + 630 = 131040
Step 209: 131040 + 630 = 131670
Step 210: 131670 + 630 = 132300
Step 211: 132300 + 630 = 132930
Step 212: 132930 + 630 = 133560
Step 213: 133560 + 630 = 134190
Step 214: 134190 + 630 = 134820
Step 215: 134820 + 630 = 135450
Step 216: 135450 + 630 = 136080
Step 217: 136080 + 630 = 136710
Step 218: 136710 + 630 = 137340
Step 219: 137340 + 630 = 137970
Step 220: 137970 + 630 = 138600
Step 221: 138600 + 630 = 139230
Step 222: 139230 + 630 = 139860
Step 223: 139860 + 630 = 140490
Step 224: 140490 + 630 = 141120
Step 225: 141120 + 630 = 141750
Step 226: 141750 + 630 = 142380
Step 227: 142380 + 630 = 143010
Step 228: 143010 + 630 = 143640
Step 229: 143640 + 630 = 144270
Step 230: 144270 + 630 = 144900
Step 231: 144900 + 630 = 145530
Step 232: 145530 + 630 = 146160
Step 233: 146160 + 630 = 146790
Step 234: 146790 + 630 = 147420
Step 235: 147420 + 630 = 148050
Step 236: 148050 + 630 = 148680
Step 237: 148680 + 630 = 149310
Step 238: 149310 + 630 = 149940
Step 239: 149940 + 630 = 150570
Step 240: 150570 + 630 = 151200
Step 241: 151200 + 630 = 151830
Step 242: 151830 + 630 = 152460
Step 243: 152460 + 630 = 153090
Step 244: 153090 + 630 = 153720
Step 245: 153720 + 630 = 154350
Step 246: 154350 + 630 = 154980
Step 247: 154980 + 630 = 155610
Step 248: 155610 + 630 = 156240
Step 249: 156240 + 630 = 156870
Step 250: 156870 + 630 = 157500
Step 251: 157500 + 630 = 158130
Step 252: 158130 + 630 = 158760
Step 253: 158760 + 630 = 159390
Step 254: 159390 + 630 = 160020
Step 255: 160020 + 630 = 160650
Step 256: 160650 + 630 = 161280
Step 257: 161280 + 630 = 161910
Step 258: 161910 + 630 = 162540
Step 259: 162540 + 630 = 163170
Step 260: 163170 + 630 = 163800
Step 261: 163800 + 630 = 164430
Step 262: 164430 + 630 = 165060
Step 263: 165060 + 630 = 165690
Step 264: 165690 + 630 = 166320
Step 265: 166320 + 630 = 166950
Step 266: 166950 + 630 = 167580
Step 267: 167580 + 630 = 168210
Step 268: 168210 + 630 = 168840
Step 269: 168840 + 630 = 169470
Step 270: 169470 + 630 = 170100
Step 271: 170100 + 630 = 170730
Step 272: 170730 + 630 = 171360
Step 273: 171360 + 630 = 171990
Step 274: 171990 + 630 = 172620
Step 275: 172620 + 630 = 173250
Step 276: 173250 + 630 = 173880
Step 277: 173880 + 630 = 174510
Step 278: 174510 + 630 = 175140
Step 279: 175140 + 630 = 175770
Step 280: 175770 + 630 = 176400
Step 281: 176400 + 630 = 177030
Step 282: 177030 + 630 = 177660
Step 283: 177660 + 630 = 178290
Step 284: 178290 + 630 = 178920
Step 285: 178920 + 630 = 179550
Step 286: 179550 + 630 = 180180
Step 287: 180180 + 630 = 180810
Step 288: 180810 + 630 = 181440
Step 289: 181440 + 630 = 182070
Step 290: 182070 + 630 = 182700
Step 291: 182700 + 630 = 183330
Step 292: 183330 + 630 = 183960
Step 293: 183960 + 630 = 184590
Step 294: 184590 + 630 = 185220
Step 295: 185220 + 630 = 185850
Step 296: 185850 + 630 = 186480
Step 297: 186480 + 630 = 187110
Step 298: 187110 + 630 = 187740
Step 299: 187740 + 630 = 188370
Step 300: 188370 + 630 = 189000
Step 301: 189000 + 630 = 189630
Step 302: 189630 + 630 = 190260
Step 303: 190260 + 630 = 190890
Step 304: 190890 + 630 = 191520
Step 305: 191520 + 630 = 192150
Step 306: 192150 + 630 = 192780
Step 307: 192780 + 630 = 193410
Step 308: 193410 + 630 = 194040
Step 309: 194040 + 630 = 194670
Step 310: 194670 + 630 = 195300
Step 311: 195300 + 630 = 195930
Step 312: 195930 + 630 = 196560
Step 313: 196560 + 630 = 197190
Step 314: 197190 + 630 = 197820
Step 315: 197820 + 630 = 198450
Step 316: 198450 + 630 = 199080
Step 317: 199080 + 630 = 199710
Step 318: 199710 + 630 = 200340
Step 319: 200340 + 630 = 200970
Step 320: 200970 + 630 = 201600
Step 321: 201600 + 630 = 202230
Step 322: 202230 + 630 = 202860
Step 323: 202860 + 630 = 203490
Step 324: 203490 + 630 = 204120
Step 325: 204120 + 630 = 204750
Step 326: 204750 + 630 = 205380
Step 327: 205380 + 630 = 206010
Step 328: 206010 + 630 = 206640
Step 329: 206640 + 630 = 207270
Step 330: 207270 + 630 = 207900
Step 331: 207900 + 630 = 208530
Step 332: 208530 + 630 = 209160
Step 333: 209160 + 630 = 209790
Step 334: 209790 + 630 = 210420
Step 335: 210420 + 630 = 211050
Step 336: 211050 + 630 = 211680
Step 337: 211680 + 630 = 212310
Step 338: 212310 + 630 = 212940
Step 339: 212940 + 630 = 213570
Step 340: 213570 + 630 = 214200
Step 341: 214200 + 630 = 214830
Step 342: 214830 + 630 = 215460
Step 343: 215460 + 630 = 216090
Step 344: 216090 + 630 = 216720
Step 345: 216720 + 630 = 217350
Step 346: 217350 + 630 = 217980
Step 347: 217980 + 630 = 218610
Step 348: 218610 + 630 = 219240
Step 349: 219240 + 630 = 219870
Step 350: 219870 + 630 = 220500
Step 351: 220500 + 630 = 221130
Step 352: 221130 + 630 = 221760
Step 353: 221760 + 630 = 222390
Step 354: 222390 + 630 = 223020
Step 355: 223020 + 630 = 223650
Step 356: 223650 + 630 = 224280
Step 357: 224280 + 630 = 224910
Step 358: 224910 + 630 = 225540
Step 359: 225540 + 630 = 226170
Step 360: 226170 + 630 = 226800
Step 361: 226800 + 630 = 227430
Step 362: 227430 + 630 = 228060
Step 363: 228060 + 630 = 228690
Step 364: 228690 + 630 = 229320
Step 365: 229320 + 630 = 229950
Step 366: 229950 + 630 = 230580
Step 367: 230580 + 630 = 231210
Step 368: 231210 + 630 = 231840
Step 369: 231840 + 630 = 232470
Step 370: 232470 + 630 = 233100
Step 371: 233100 + 630 = 233730
Step 372: 233730 + 630 = 234360
Step 373: 234360 + 630 = 234990
Step 374: 234990 + 630 = 235620
Step 375: 235620 + 630 = 236250
Step 376: 236250 + 630 = 236880
Step 377: 236880 + 630 = 237510
Step 378: 237510 + 630 = 238140
Step 379: 238140 + 630 = 238770
Step 380: 238770 + 630 = 239400
Step 381: 239400 + 630 = 240030
Step 382: 240030 + 630 = 240660
Step 383: 240660 + 630 = 241290
Step 384: 241290 + 630 = 241920
Step 385: 241920 + 630 = 242550
Step 386: 242550 + 630 = 243180
Step 387: 243180 + 630 = 243810
Step 388: 243810 + 630 = 244440
Step 389: 244440 + 630 = 245070
Step 390: 245070 + 630 = 245700
Step 391: 245700 + 630 = 246330
Step 392: 246330 + 630 = 246960
Step 393: 246960 + 630 = 247590
Step 394: 247590 + 630 = 248220
Step 395: 248220 + 630 = 248850
Step 396: 248850 + 630 = 249480
Step 397: 249480 + 630 = 250110
Step 398: 250110 + 630 = 250740
Step 399: 250740 + 630 = 251370
Step 400: 251370 + 630 = 252000
Step 401: 252000 + 630 = 252630
Step 402: 252630 + 630 = 253260
Step 403: 253260 + 630 = 253890
Step 404: 253890 + 630 = 254520
Step 405: 254520 + 630 = 255150
Step 406: 255150 + 630 = 255780
Step 407: 255780 + 630 = 256410
Step 408: 256410 + 630 = 257040
Step 409: 257040 + 630 = 257670
Step 410: 257670 + 630 = 258300
Step 411: 258300 + 630 = 258930
Step 412: 258930 + 630 = 259560
Step 413: 259560 + 630 = 260190
Step 414: 260190 + 630 = 260820
Step 415: 260820 + 630 = 261450
Step 416: 261450 + 630 = 262080
Step 417: 262080 + 630 = 262710
Step 418: 262710 + 630 = 263340
Step 419: 263340 + 630 = 263970
Step 420: 263970 + 630 = 264600
Step 421: 264600 + 630 = 265230
Step 422: 265230 + 630 = 265860
Step 423: 265860 + 630 = 266490
Step 424: 266490 + 630 = 267120
Step 425: 267120 + 630 = 267750
Step 426: 267750 + 630 = 268380
Step 427: 268380 + 630 = 269010
Step 428: 269010 + 630 = 269640
Step 429: 269640 + 630 = 270270
Step 430: 270270 + 630 = 270900
Step 431: 270900 + 630 = 271530
Step 432: 271530 + 630 = 272160
Step 433: 272160 + 630 = 272790
Step 434: 272790 + 630 = 273420
Step 435: 273420 + 630 = 274050
Step 436: 274050 + 630 = 274680
Step 437: 274680 + 630 = 275310
Step 438: 275310 + 630 = 275940
Step 439: 275940 + 630 = 276570
Step 440: 276570 + 630 = 277200
Step 441: 277200 + 630 = 277830
Step 442: 277830 + 630 = 278460
Step 443: 278460 + 630 = 279090
Step 444: 279090 + 630 = 279720
Step 445: 279720 + 630 = 280350
Step 446: 280350 + 630 = 280980
Step 447: 280980 + 630 = 281610
Step 448: 281610 + 630 = 282240
Step 449: 282240 + 630 = 282870
Step 450: 282870 + 630 = 283500
Step 451: 283500 + 630 = 284130
Step 452: 284130 + 630 = 284760
Step 453: 284760 + 630 = 285390
Step 454: 285390 + 630 = 286020
Step 455: 286020 + 630 = 286650

So, 630*455 = 286650