OK, let's work through this together. We're starting with 997 and we're going to multiply it by 393, which means we add 997 to itself 393 times.
Step 1: 0 + 997 = 997
Step 2: 997 + 997 = 1994
Step 3: 1994 + 997 = 2991
Step 4: 2991 + 997 = 3988
Step 5: 3988 + 997 = 4985
Step 6: 4985 + 997 = 5982
Step 7: 5982 + 997 = 6979
Step 8: 6979 + 997 = 7976
Step 9: 7976 + 997 = 8973
Step 10: 8973 + 997 = 9970
Step 11: 9970 + 997 = 10967
Step 12: 10967 + 997 = 11964
Step 13: 11964 + 997 = 12961
Step 14: 12961 + 997 = 13958
Step 15: 13958 + 997 = 14955
Step 16: 14955 + 997 = 15952
Step 17: 15952 + 997 = 16949
Step 18: 16949 + 997 = 17946
Step 19: 17946 + 997 = 18943
Step 20: 18943 + 997 = 19940
Step 21: 19940 + 997 = 20937
Step 22: 20937 + 997 = 21934
Step 23: 21934 + 997 = 22931
Step 24: 22931 + 997 = 23928
Step 25: 23928 + 997 = 24925
Step 26: 24925 + 997 = 25922
Step 27: 25922 + 997 = 26919
Step 28: 26919 + 997 = 27916
Step 29: 27916 + 997 = 28913
Step 30: 28913 + 997 = 29910
Step 31: 29910 + 997 = 30907
Step 32: 30907 + 997 = 31904
Step 33: 31904 + 997 = 32901
Step 34: 32901 + 997 = 33898
Step 35: 33898 + 997 = 34895
Step 36: 34895 + 997 = 35892
Step 37: 35892 + 997 = 36889
Step 38: 36889 + 997 = 37886
Step 39: 37886 + 997 = 38883
Step 40: 38883 + 997 = 39880
Step 41: 39880 + 997 = 40877
Step 42: 40877 + 997 = 41874
Step 43: 41874 + 997 = 42871
Step 44: 42871 + 997 = 43868
Step 45: 43868 + 997 = 44865
Step 46: 44865 + 997 = 45862
Step 47: 45862 + 997 = 46859
Step 48: 46859 + 997 = 47856
Step 49: 47856 + 997 = 48853
Step 50: 48853 + 997 = 49850
Step 51: 49850 + 997 = 50847
Step 52: 50847 + 997 = 51844
Step 53: 51844 + 997 = 52841
Step 54: 52841 + 997 = 53838
Step 55: 53838 + 997 = 54835
Step 56: 54835 + 997 = 55832
Step 57: 55832 + 997 = 56829
Step 58: 56829 + 997 = 57826
Step 59: 57826 + 997 = 58823
Step 60: 58823 + 997 = 59820
Step 61: 59820 + 997 = 60817
Step 62: 60817 + 997 = 61814
Step 63: 61814 + 997 = 62811
Step 64: 62811 + 997 = 63808
Step 65: 63808 + 997 = 64805
Step 66: 64805 + 997 = 65802
Step 67: 65802 + 997 = 66799
Step 68: 66799 + 997 = 67796
Step 69: 67796 + 997 = 68793
Step 70: 68793 + 997 = 69790
Step 71: 69790 + 997 = 70787
Step 72: 70787 + 997 = 71784
Step 73: 71784 + 997 = 72781
Step 74: 72781 + 997 = 73778
Step 75: 73778 + 997 = 74775
Step 76: 74775 + 997 = 75772
Step 77: 75772 + 997 = 76769
Step 78: 76769 + 997 = 77766
Step 79: 77766 + 997 = 78763
Step 80: 78763 + 997 = 79760
Step 81: 79760 + 997 = 80757
Step 82: 80757 + 997 = 81754
Step 83: 81754 + 997 = 82751
Step 84: 82751 + 997 = 83748
Step 85: 83748 + 997 = 84745
Step 86: 84745 + 997 = 85742
Step 87: 85742 + 997 = 86739
Step 88: 86739 + 997 = 87736
Step 89: 87736 + 997 = 88733
Step 90: 88733 + 997 = 89730
Step 91: 89730 + 997 = 90727
Step 92: 90727 + 997 = 91724
Step 93: 91724 + 997 = 92721
Step 94: 92721 + 997 = 93718
Step 95: 93718 + 997 = 94715
Step 96: 94715 + 997 = 95712
Step 97: 95712 + 997 = 96709
Step 98: 96709 + 997 = 97706
Step 99: 97706 + 997 = 98703
Step 100: 98703 + 997 = 99700
Step 101: 99700 + 997 = 100697
Step 102: 100697 + 997 = 101694
Step 103: 101694 + 997 = 102691
Step 104: 102691 + 997 = 103688
Step 105: 103688 + 997 = 104685
Step 106: 104685 + 997 = 105682
Step 107: 105682 + 997 = 106679
Step 108: 106679 + 997 = 107676
Step 109: 107676 + 997 = 108673
Step 110: 108673 + 997 = 109670
Step 111: 109670 + 997 = 110667
Step 112: 110667 + 997 = 111664
Step 113: 111664 + 997 = 112661
Step 114: 112661 + 997 = 113658
Step 115: 113658 + 997 = 114655
Step 116: 114655 + 997 = 115652
Step 117: 115652 + 997 = 116649
Step 118: 116649 + 997 = 117646
Step 119: 117646 + 997 = 118643
Step 120: 118643 + 997 = 119640
Step 121: 119640 + 997 = 120637
Step 122: 120637 + 997 = 121634
Step 123: 121634 + 997 = 122631
Step 124: 122631 + 997 = 123628
Step 125: 123628 + 997 = 124625
Step 126: 124625 + 997 = 125622
Step 127: 125622 + 997 = 126619
Step 128: 126619 + 997 = 127616
Step 129: 127616 + 997 = 128613
Step 130: 128613 + 997 = 129610
Step 131: 129610 + 997 = 130607
Step 132: 130607 + 997 = 131604
Step 133: 131604 + 997 = 132601
Step 134: 132601 + 997 = 133598
Step 135: 133598 + 997 = 134595
Step 136: 134595 + 997 = 135592
Step 137: 135592 + 997 = 136589
Step 138: 136589 + 997 = 137586
Step 139: 137586 + 997 = 138583
Step 140: 138583 + 997 = 139580
Step 141: 139580 + 997 = 140577
Step 142: 140577 + 997 = 141574
Step 143: 141574 + 997 = 142571
Step 144: 142571 + 997 = 143568
Step 145: 143568 + 997 = 144565
Step 146: 144565 + 997 = 145562
Step 147: 145562 + 997 = 146559
Step 148: 146559 + 997 = 147556
Step 149: 147556 + 997 = 148553
Step 150: 148553 + 997 = 149550
Step 151: 149550 + 997 = 150547
Step 152: 150547 + 997 = 151544
Step 153: 151544 + 997 = 152541
Step 154: 152541 + 997 = 153538
Step 155: 153538 + 997 = 154535
Step 156: 154535 + 997 = 155532
Step 157: 155532 + 997 = 156529
Step 158: 156529 + 997 = 157526
Step 159: 157526 + 997 = 158523
Step 160: 158523 + 997 = 159520
Step 161: 159520 + 997 = 160517
Step 162: 160517 + 997 = 161514
Step 163: 161514 + 997 = 162511
Step 164: 162511 + 997 = 163508
Step 165: 163508 + 997 = 164505
Step 166: 164505 + 997 = 165502
Step 167: 165502 + 997 = 166499
Step 168: 166499 + 997 = 167496
Step 169: 167496 + 997 = 168493
Step 170: 168493 + 997 = 169490
Step 171: 169490 + 997 = 170487
Step 172: 170487 + 997 = 171484
Step 173: 171484 + 997 = 172481
Step 174: 172481 + 997 = 173478
Step 175: 173478 + 997 = 174475
Step 176: 174475 + 997 = 175472
Step 177: 175472 + 997 = 176469
Step 178: 176469 + 997 = 177466
Step 179: 177466 + 997 = 178463
Step 180: 178463 + 997 = 179460
Step 181: 179460 + 997 = 180457
Step 182: 180457 + 997 = 181454
Step 183: 181454 + 997 = 182451
Step 184: 182451 + 997 = 183448
Step 185: 183448 + 997 = 184445
Step 186: 184445 + 997 = 185442
Step 187: 185442 + 997 = 186439
Step 188: 186439 + 997 = 187436
Step 189: 187436 + 997 = 188433
Step 190: 188433 + 997 = 189430
Step 191: 189430 + 997 = 190427
Step 192: 190427 + 997 = 191424
Step 193: 191424 + 997 = 192421
Step 194: 192421 + 997 = 193418
Step 195: 193418 + 997 = 194415
Step 196: 194415 + 997 = 195412
Step 197: 195412 + 997 = 196409
Step 198: 196409 + 997 = 197406
Step 199: 197406 + 997 = 198403
Step 200: 198403 + 997 = 199400
Step 201: 199400 + 997 = 200397
Step 202: 200397 + 997 = 201394
Step 203: 201394 + 997 = 202391
Step 204: 202391 + 997 = 203388
Step 205: 203388 + 997 = 204385
Step 206: 204385 + 997 = 205382
Step 207: 205382 + 997 = 206379
Step 208: 206379 + 997 = 207376
Step 209: 207376 + 997 = 208373
Step 210: 208373 + 997 = 209370
Step 211: 209370 + 997 = 210367
Step 212: 210367 + 997 = 211364
Step 213: 211364 + 997 = 212361
Step 214: 212361 + 997 = 213358
Step 215: 213358 + 997 = 214355
Step 216: 214355 + 997 = 215352
Step 217: 215352 + 997 = 216349
Step 218: 216349 + 997 = 217346
Step 219: 217346 + 997 = 218343
Step 220: 218343 + 997 = 219340
Step 221: 219340 + 997 = 220337
Step 222: 220337 + 997 = 221334
Step 223: 221334 + 997 = 222331
Step 224: 222331 + 997 = 223328
Step 225: 223328 + 997 = 224325
Step 226: 224325 + 997 = 225322
Step 227: 225322 + 997 = 226319
Step 228: 226319 + 997 = 227316
Step 229: 227316 + 997 = 228313
Step 230: 228313 + 997 = 229310
Step 231: 229310 + 997 = 230307
Step 232: 230307 + 997 = 231304
Step 233: 231304 + 997 = 232301
Step 234: 232301 + 997 = 233298
Step 235: 233298 + 997 = 234295
Step 236: 234295 + 997 = 235292
Step 237: 235292 + 997 = 236289
Step 238: 236289 + 997 = 237286
Step 239: 237286 + 997 = 238283
Step 240: 238283 + 997 = 239280
Step 241: 239280 + 997 = 240277
Step 242: 240277 + 997 = 241274
Step 243: 241274 + 997 = 242271
Step 244: 242271 + 997 = 243268
Step 245: 243268 + 997 = 244265
Step 246: 244265 + 997 = 245262
Step 247: 245262 + 997 = 246259
Step 248: 246259 + 997 = 247256
Step 249: 247256 + 997 = 248253
Step 250: 248253 + 997 = 249250
Step 251: 249250 + 997 = 250247
Step 252: 250247 + 997 = 251244
Step 253: 251244 + 997 = 252241
Step 254: 252241 + 997 = 253238
Step 255: 253238 + 997 = 254235
Step 256: 254235 + 997 = 255232
Step 257: 255232 + 997 = 256229
Step 258: 256229 + 997 = 257226
Step 259: 257226 + 997 = 258223
Step 260: 258223 + 997 = 259220
Step 261: 259220 + 997 = 260217
Step 262: 260217 + 997 = 261214
Step 263: 261214 + 997 = 262211
Step 264: 262211 + 997 = 263208
Step 265: 263208 + 997 = 264205
Step 266: 264205 + 997 = 265202
Step 267: 265202 + 997 = 266199
Step 268: 266199 + 997 = 267196
Step 269: 267196 + 997 = 268193
Step 270: 268193 + 997 = 269190
Step 271: 269190 + 997 = 270187
Step 272: 270187 + 997 = 271184
Step 273: 271184 + 997 = 272181
Step 274: 272181 + 997 = 273178
Step 275: 273178 + 997 = 274175
Step 276: 274175 + 997 = 275172
Step 277: 275172 + 997 = 276169
Step 278: 276169 + 997 = 277166
Step 279: 277166 + 997 = 278163
Step 280: 278163 + 997 = 279160
Step 281: 279160 + 997 = 280157
Step 282: 280157 + 997 = 281154
Step 283: 281154 + 997 = 282151
Step 284: 282151 + 997 = 283148
Step 285: 283148 + 997 = 284145
Step 286: 284145 + 997 = 285142
Step 287: 285142 + 997 = 286139
Step 288: 286139 + 997 = 287136
Step 289: 287136 + 997 = 288133
Step 290: 288133 + 997 = 289130
Step 291: 289130 + 997 = 290127
Step 292: 290127 + 997 = 291124
Step 293: 291124 + 997 = 292121
Step 294: 292121 + 997 = 293118
Step 295: 293118 + 997 = 294115
Step 296: 294115 + 997 = 295112
Step 297: 295112 + 997 = 296109
Step 298: 296109 + 997 = 297106
Step 299: 297106 + 997 = 298103
Step 300: 298103 + 997 = 299100
Step 301: 299100 + 997 = 300097
Step 302: 300097 + 997 = 301094
Step 303: 301094 + 997 = 302091
Step 304: 302091 + 997 = 303088
Step 305: 303088 + 997 = 304085
Step 306: 304085 + 997 = 305082
Step 307: 305082 + 997 = 306079
Step 308: 306079 + 997 = 307076
Step 309: 307076 + 997 = 308073
Step 310: 308073 + 997 = 309070
Step 311: 309070 + 997 = 310067
Step 312: 310067 + 997 = 311064
Step 313: 311064 + 997 = 312061
Step 314: 312061 + 997 = 313058
Step 315: 313058 + 997 = 314055
Step 316: 314055 + 997 = 315052
Step 317: 315052 + 997 = 316049
Step 318: 316049 + 997 = 317046
Step 319: 317046 + 997 = 318043
Step 320: 318043 + 997 = 319040
Step 321: 319040 + 997 = 320037
Step 322: 320037 + 997 = 321034
Step 323: 321034 + 997 = 322031
Step 324: 322031 + 997 = 323028
Step 325: 323028 + 997 = 324025
Step 326: 324025 + 997 = 325022
Step 327: 325022 + 997 = 326019
Step 328: 326019 + 997 = 327016
Step 329: 327016 + 997 = 328013
Step 330: 328013 + 997 = 329010
Step 331: 329010 + 997 = 330007
Step 332: 330007 + 997 = 331004
Step 333: 331004 + 997 = 332001
Step 334: 332001 + 997 = 332998
Step 335: 332998 + 997 = 333995
Step 336: 333995 + 997 = 334992
Step 337: 334992 + 997 = 335989
Step 338: 335989 + 997 = 336986
Step 339: 336986 + 997 = 337983
Step 340: 337983 + 997 = 338980
Step 341: 338980 + 997 = 339977
Step 342: 339977 + 997 = 340974
Step 343: 340974 + 997 = 341971
Step 344: 341971 + 997 = 342968
Step 345: 342968 + 997 = 343965
Step 346: 343965 + 997 = 344962
Step 347: 344962 + 997 = 345959
Step 348: 345959 + 997 = 346956
Step 349: 346956 + 997 = 347953
Step 350: 347953 + 997 = 348950
Step 351: 348950 + 997 = 349947
Step 352: 349947 + 997 = 350944
Step 353: 350944 + 997 = 351941
Step 354: 351941 + 997 = 352938
Step 355: 352938 + 997 = 353935
Step 356: 353935 + 997 = 354932
Step 357: 354932 + 997 = 355929
Step 358: 355929 + 997 = 356926
Step 359: 356926 + 997 = 357923
Step 360: 357923 + 997 = 358920
Step 361: 358920 + 997 = 359917
Step 362: 359917 + 997 = 360914
Step 363: 360914 + 997 = 361911
Step 364: 361911 + 997 = 362908
Step 365: 362908 + 997 = 363905
Step 366: 363905 + 997 = 364902
Step 367: 364902 + 997 = 365899
Step 368: 365899 + 997 = 366896
Step 369: 366896 + 997 = 367893
Step 370: 367893 + 997 = 368890
Step 371: 368890 + 997 = 369887
Step 372: 369887 + 997 = 370884
Step 373: 370884 + 997 = 371881
Step 374: 371881 + 997 = 372878
Step 375: 372878 + 997 = 373875
Step 376: 373875 + 997 = 374872
Step 377: 374872 + 997 = 375869
Step 378: 375869 + 997 = 376866
Step 379: 376866 + 997 = 377863
Step 380: 377863 + 997 = 378860
Step 381: 378860 + 997 = 379857
Step 382: 379857 + 997 = 380854
Step 383: 380854 + 997 = 381851
Step 384: 381851 + 997 = 382848
Step 385: 382848 + 997 = 383845
Step 386: 383845 + 997 = 384842
Step 387: 384842 + 997 = 385839
Step 388: 385839 + 997 = 386836
Step 389: 386836 + 997 = 387833
Step 390: 387833 + 997 = 388830
Step 391: 388830 + 997 = 389827
Step 392: 389827 + 997 = 390824
Step 393: 390824 + 997 = 391821

So, 997*393 = 391821