Let's get this math done. We have 663 and we're going to multiply it by 397. This is the same as taking 663 and adding it to itself 397 times.
Step 1: 0 + 663 = 663
Step 2: 663 + 663 = 1326
Step 3: 1326 + 663 = 1989
Step 4: 1989 + 663 = 2652
Step 5: 2652 + 663 = 3315
Step 6: 3315 + 663 = 3978
Step 7: 3978 + 663 = 4641
Step 8: 4641 + 663 = 5304
Step 9: 5304 + 663 = 5967
Step 10: 5967 + 663 = 6630
Step 11: 6630 + 663 = 7293
Step 12: 7293 + 663 = 7956
Step 13: 7956 + 663 = 8619
Step 14: 8619 + 663 = 9282
Step 15: 9282 + 663 = 9945
Step 16: 9945 + 663 = 10608
Step 17: 10608 + 663 = 11271
Step 18: 11271 + 663 = 11934
Step 19: 11934 + 663 = 12597
Step 20: 12597 + 663 = 13260
Step 21: 13260 + 663 = 13923
Step 22: 13923 + 663 = 14586
Step 23: 14586 + 663 = 15249
Step 24: 15249 + 663 = 15912
Step 25: 15912 + 663 = 16575
Step 26: 16575 + 663 = 17238
Step 27: 17238 + 663 = 17901
Step 28: 17901 + 663 = 18564
Step 29: 18564 + 663 = 19227
Step 30: 19227 + 663 = 19890
Step 31: 19890 + 663 = 20553
Step 32: 20553 + 663 = 21216
Step 33: 21216 + 663 = 21879
Step 34: 21879 + 663 = 22542
Step 35: 22542 + 663 = 23205
Step 36: 23205 + 663 = 23868
Step 37: 23868 + 663 = 24531
Step 38: 24531 + 663 = 25194
Step 39: 25194 + 663 = 25857
Step 40: 25857 + 663 = 26520
Step 41: 26520 + 663 = 27183
Step 42: 27183 + 663 = 27846
Step 43: 27846 + 663 = 28509
Step 44: 28509 + 663 = 29172
Step 45: 29172 + 663 = 29835
Step 46: 29835 + 663 = 30498
Step 47: 30498 + 663 = 31161
Step 48: 31161 + 663 = 31824
Step 49: 31824 + 663 = 32487
Step 50: 32487 + 663 = 33150
Step 51: 33150 + 663 = 33813
Step 52: 33813 + 663 = 34476
Step 53: 34476 + 663 = 35139
Step 54: 35139 + 663 = 35802
Step 55: 35802 + 663 = 36465
Step 56: 36465 + 663 = 37128
Step 57: 37128 + 663 = 37791
Step 58: 37791 + 663 = 38454
Step 59: 38454 + 663 = 39117
Step 60: 39117 + 663 = 39780
Step 61: 39780 + 663 = 40443
Step 62: 40443 + 663 = 41106
Step 63: 41106 + 663 = 41769
Step 64: 41769 + 663 = 42432
Step 65: 42432 + 663 = 43095
Step 66: 43095 + 663 = 43758
Step 67: 43758 + 663 = 44421
Step 68: 44421 + 663 = 45084
Step 69: 45084 + 663 = 45747
Step 70: 45747 + 663 = 46410
Step 71: 46410 + 663 = 47073
Step 72: 47073 + 663 = 47736
Step 73: 47736 + 663 = 48399
Step 74: 48399 + 663 = 49062
Step 75: 49062 + 663 = 49725
Step 76: 49725 + 663 = 50388
Step 77: 50388 + 663 = 51051
Step 78: 51051 + 663 = 51714
Step 79: 51714 + 663 = 52377
Step 80: 52377 + 663 = 53040
Step 81: 53040 + 663 = 53703
Step 82: 53703 + 663 = 54366
Step 83: 54366 + 663 = 55029
Step 84: 55029 + 663 = 55692
Step 85: 55692 + 663 = 56355
Step 86: 56355 + 663 = 57018
Step 87: 57018 + 663 = 57681
Step 88: 57681 + 663 = 58344
Step 89: 58344 + 663 = 59007
Step 90: 59007 + 663 = 59670
Step 91: 59670 + 663 = 60333
Step 92: 60333 + 663 = 60996
Step 93: 60996 + 663 = 61659
Step 94: 61659 + 663 = 62322
Step 95: 62322 + 663 = 62985
Step 96: 62985 + 663 = 63648
Step 97: 63648 + 663 = 64311
Step 98: 64311 + 663 = 64974
Step 99: 64974 + 663 = 65637
Step 100: 65637 + 663 = 66300
Step 101: 66300 + 663 = 66963
Step 102: 66963 + 663 = 67626
Step 103: 67626 + 663 = 68289
Step 104: 68289 + 663 = 68952
Step 105: 68952 + 663 = 69615
Step 106: 69615 + 663 = 70278
Step 107: 70278 + 663 = 70941
Step 108: 70941 + 663 = 71604
Step 109: 71604 + 663 = 72267
Step 110: 72267 + 663 = 72930
Step 111: 72930 + 663 = 73593
Step 112: 73593 + 663 = 74256
Step 113: 74256 + 663 = 74919
Step 114: 74919 + 663 = 75582
Step 115: 75582 + 663 = 76245
Step 116: 76245 + 663 = 76908
Step 117: 76908 + 663 = 77571
Step 118: 77571 + 663 = 78234
Step 119: 78234 + 663 = 78897
Step 120: 78897 + 663 = 79560
Step 121: 79560 + 663 = 80223
Step 122: 80223 + 663 = 80886
Step 123: 80886 + 663 = 81549
Step 124: 81549 + 663 = 82212
Step 125: 82212 + 663 = 82875
Step 126: 82875 + 663 = 83538
Step 127: 83538 + 663 = 84201
Step 128: 84201 + 663 = 84864
Step 129: 84864 + 663 = 85527
Step 130: 85527 + 663 = 86190
Step 131: 86190 + 663 = 86853
Step 132: 86853 + 663 = 87516
Step 133: 87516 + 663 = 88179
Step 134: 88179 + 663 = 88842
Step 135: 88842 + 663 = 89505
Step 136: 89505 + 663 = 90168
Step 137: 90168 + 663 = 90831
Step 138: 90831 + 663 = 91494
Step 139: 91494 + 663 = 92157
Step 140: 92157 + 663 = 92820
Step 141: 92820 + 663 = 93483
Step 142: 93483 + 663 = 94146
Step 143: 94146 + 663 = 94809
Step 144: 94809 + 663 = 95472
Step 145: 95472 + 663 = 96135
Step 146: 96135 + 663 = 96798
Step 147: 96798 + 663 = 97461
Step 148: 97461 + 663 = 98124
Step 149: 98124 + 663 = 98787
Step 150: 98787 + 663 = 99450
Step 151: 99450 + 663 = 100113
Step 152: 100113 + 663 = 100776
Step 153: 100776 + 663 = 101439
Step 154: 101439 + 663 = 102102
Step 155: 102102 + 663 = 102765
Step 156: 102765 + 663 = 103428
Step 157: 103428 + 663 = 104091
Step 158: 104091 + 663 = 104754
Step 159: 104754 + 663 = 105417
Step 160: 105417 + 663 = 106080
Step 161: 106080 + 663 = 106743
Step 162: 106743 + 663 = 107406
Step 163: 107406 + 663 = 108069
Step 164: 108069 + 663 = 108732
Step 165: 108732 + 663 = 109395
Step 166: 109395 + 663 = 110058
Step 167: 110058 + 663 = 110721
Step 168: 110721 + 663 = 111384
Step 169: 111384 + 663 = 112047
Step 170: 112047 + 663 = 112710
Step 171: 112710 + 663 = 113373
Step 172: 113373 + 663 = 114036
Step 173: 114036 + 663 = 114699
Step 174: 114699 + 663 = 115362
Step 175: 115362 + 663 = 116025
Step 176: 116025 + 663 = 116688
Step 177: 116688 + 663 = 117351
Step 178: 117351 + 663 = 118014
Step 179: 118014 + 663 = 118677
Step 180: 118677 + 663 = 119340
Step 181: 119340 + 663 = 120003
Step 182: 120003 + 663 = 120666
Step 183: 120666 + 663 = 121329
Step 184: 121329 + 663 = 121992
Step 185: 121992 + 663 = 122655
Step 186: 122655 + 663 = 123318
Step 187: 123318 + 663 = 123981
Step 188: 123981 + 663 = 124644
Step 189: 124644 + 663 = 125307
Step 190: 125307 + 663 = 125970
Step 191: 125970 + 663 = 126633
Step 192: 126633 + 663 = 127296
Step 193: 127296 + 663 = 127959
Step 194: 127959 + 663 = 128622
Step 195: 128622 + 663 = 129285
Step 196: 129285 + 663 = 129948
Step 197: 129948 + 663 = 130611
Step 198: 130611 + 663 = 131274
Step 199: 131274 + 663 = 131937
Step 200: 131937 + 663 = 132600
Step 201: 132600 + 663 = 133263
Step 202: 133263 + 663 = 133926
Step 203: 133926 + 663 = 134589
Step 204: 134589 + 663 = 135252
Step 205: 135252 + 663 = 135915
Step 206: 135915 + 663 = 136578
Step 207: 136578 + 663 = 137241
Step 208: 137241 + 663 = 137904
Step 209: 137904 + 663 = 138567
Step 210: 138567 + 663 = 139230
Step 211: 139230 + 663 = 139893
Step 212: 139893 + 663 = 140556
Step 213: 140556 + 663 = 141219
Step 214: 141219 + 663 = 141882
Step 215: 141882 + 663 = 142545
Step 216: 142545 + 663 = 143208
Step 217: 143208 + 663 = 143871
Step 218: 143871 + 663 = 144534
Step 219: 144534 + 663 = 145197
Step 220: 145197 + 663 = 145860
Step 221: 145860 + 663 = 146523
Step 222: 146523 + 663 = 147186
Step 223: 147186 + 663 = 147849
Step 224: 147849 + 663 = 148512
Step 225: 148512 + 663 = 149175
Step 226: 149175 + 663 = 149838
Step 227: 149838 + 663 = 150501
Step 228: 150501 + 663 = 151164
Step 229: 151164 + 663 = 151827
Step 230: 151827 + 663 = 152490
Step 231: 152490 + 663 = 153153
Step 232: 153153 + 663 = 153816
Step 233: 153816 + 663 = 154479
Step 234: 154479 + 663 = 155142
Step 235: 155142 + 663 = 155805
Step 236: 155805 + 663 = 156468
Step 237: 156468 + 663 = 157131
Step 238: 157131 + 663 = 157794
Step 239: 157794 + 663 = 158457
Step 240: 158457 + 663 = 159120
Step 241: 159120 + 663 = 159783
Step 242: 159783 + 663 = 160446
Step 243: 160446 + 663 = 161109
Step 244: 161109 + 663 = 161772
Step 245: 161772 + 663 = 162435
Step 246: 162435 + 663 = 163098
Step 247: 163098 + 663 = 163761
Step 248: 163761 + 663 = 164424
Step 249: 164424 + 663 = 165087
Step 250: 165087 + 663 = 165750
Step 251: 165750 + 663 = 166413
Step 252: 166413 + 663 = 167076
Step 253: 167076 + 663 = 167739
Step 254: 167739 + 663 = 168402
Step 255: 168402 + 663 = 169065
Step 256: 169065 + 663 = 169728
Step 257: 169728 + 663 = 170391
Step 258: 170391 + 663 = 171054
Step 259: 171054 + 663 = 171717
Step 260: 171717 + 663 = 172380
Step 261: 172380 + 663 = 173043
Step 262: 173043 + 663 = 173706
Step 263: 173706 + 663 = 174369
Step 264: 174369 + 663 = 175032
Step 265: 175032 + 663 = 175695
Step 266: 175695 + 663 = 176358
Step 267: 176358 + 663 = 177021
Step 268: 177021 + 663 = 177684
Step 269: 177684 + 663 = 178347
Step 270: 178347 + 663 = 179010
Step 271: 179010 + 663 = 179673
Step 272: 179673 + 663 = 180336
Step 273: 180336 + 663 = 180999
Step 274: 180999 + 663 = 181662
Step 275: 181662 + 663 = 182325
Step 276: 182325 + 663 = 182988
Step 277: 182988 + 663 = 183651
Step 278: 183651 + 663 = 184314
Step 279: 184314 + 663 = 184977
Step 280: 184977 + 663 = 185640
Step 281: 185640 + 663 = 186303
Step 282: 186303 + 663 = 186966
Step 283: 186966 + 663 = 187629
Step 284: 187629 + 663 = 188292
Step 285: 188292 + 663 = 188955
Step 286: 188955 + 663 = 189618
Step 287: 189618 + 663 = 190281
Step 288: 190281 + 663 = 190944
Step 289: 190944 + 663 = 191607
Step 290: 191607 + 663 = 192270
Step 291: 192270 + 663 = 192933
Step 292: 192933 + 663 = 193596
Step 293: 193596 + 663 = 194259
Step 294: 194259 + 663 = 194922
Step 295: 194922 + 663 = 195585
Step 296: 195585 + 663 = 196248
Step 297: 196248 + 663 = 196911
Step 298: 196911 + 663 = 197574
Step 299: 197574 + 663 = 198237
Step 300: 198237 + 663 = 198900
Step 301: 198900 + 663 = 199563
Step 302: 199563 + 663 = 200226
Step 303: 200226 + 663 = 200889
Step 304: 200889 + 663 = 201552
Step 305: 201552 + 663 = 202215
Step 306: 202215 + 663 = 202878
Step 307: 202878 + 663 = 203541
Step 308: 203541 + 663 = 204204
Step 309: 204204 + 663 = 204867
Step 310: 204867 + 663 = 205530
Step 311: 205530 + 663 = 206193
Step 312: 206193 + 663 = 206856
Step 313: 206856 + 663 = 207519
Step 314: 207519 + 663 = 208182
Step 315: 208182 + 663 = 208845
Step 316: 208845 + 663 = 209508
Step 317: 209508 + 663 = 210171
Step 318: 210171 + 663 = 210834
Step 319: 210834 + 663 = 211497
Step 320: 211497 + 663 = 212160
Step 321: 212160 + 663 = 212823
Step 322: 212823 + 663 = 213486
Step 323: 213486 + 663 = 214149
Step 324: 214149 + 663 = 214812
Step 325: 214812 + 663 = 215475
Step 326: 215475 + 663 = 216138
Step 327: 216138 + 663 = 216801
Step 328: 216801 + 663 = 217464
Step 329: 217464 + 663 = 218127
Step 330: 218127 + 663 = 218790
Step 331: 218790 + 663 = 219453
Step 332: 219453 + 663 = 220116
Step 333: 220116 + 663 = 220779
Step 334: 220779 + 663 = 221442
Step 335: 221442 + 663 = 222105
Step 336: 222105 + 663 = 222768
Step 337: 222768 + 663 = 223431
Step 338: 223431 + 663 = 224094
Step 339: 224094 + 663 = 224757
Step 340: 224757 + 663 = 225420
Step 341: 225420 + 663 = 226083
Step 342: 226083 + 663 = 226746
Step 343: 226746 + 663 = 227409
Step 344: 227409 + 663 = 228072
Step 345: 228072 + 663 = 228735
Step 346: 228735 + 663 = 229398
Step 347: 229398 + 663 = 230061
Step 348: 230061 + 663 = 230724
Step 349: 230724 + 663 = 231387
Step 350: 231387 + 663 = 232050
Step 351: 232050 + 663 = 232713
Step 352: 232713 + 663 = 233376
Step 353: 233376 + 663 = 234039
Step 354: 234039 + 663 = 234702
Step 355: 234702 + 663 = 235365
Step 356: 235365 + 663 = 236028
Step 357: 236028 + 663 = 236691
Step 358: 236691 + 663 = 237354
Step 359: 237354 + 663 = 238017
Step 360: 238017 + 663 = 238680
Step 361: 238680 + 663 = 239343
Step 362: 239343 + 663 = 240006
Step 363: 240006 + 663 = 240669
Step 364: 240669 + 663 = 241332
Step 365: 241332 + 663 = 241995
Step 366: 241995 + 663 = 242658
Step 367: 242658 + 663 = 243321
Step 368: 243321 + 663 = 243984
Step 369: 243984 + 663 = 244647
Step 370: 244647 + 663 = 245310
Step 371: 245310 + 663 = 245973
Step 372: 245973 + 663 = 246636
Step 373: 246636 + 663 = 247299
Step 374: 247299 + 663 = 247962
Step 375: 247962 + 663 = 248625
Step 376: 248625 + 663 = 249288
Step 377: 249288 + 663 = 249951
Step 378: 249951 + 663 = 250614
Step 379: 250614 + 663 = 251277
Step 380: 251277 + 663 = 251940
Step 381: 251940 + 663 = 252603
Step 382: 252603 + 663 = 253266
Step 383: 253266 + 663 = 253929
Step 384: 253929 + 663 = 254592
Step 385: 254592 + 663 = 255255
Step 386: 255255 + 663 = 255918
Step 387: 255918 + 663 = 256581
Step 388: 256581 + 663 = 257244
Step 389: 257244 + 663 = 257907
Step 390: 257907 + 663 = 258570
Step 391: 258570 + 663 = 259233
Step 392: 259233 + 663 = 259896
Step 393: 259896 + 663 = 260559
Step 394: 260559 + 663 = 261222
Step 395: 261222 + 663 = 261885
Step 396: 261885 + 663 = 262548
Step 397: 262548 + 663 = 263211

So, 663*397 = 263211