OK, let's work through this together. We're starting with 509 and we're going to multiply it by 392, which means we add 509 to itself 392 times.
Step 1: 0 + 509 = 509
Step 2: 509 + 509 = 1018
Step 3: 1018 + 509 = 1527
Step 4: 1527 + 509 = 2036
Step 5: 2036 + 509 = 2545
Step 6: 2545 + 509 = 3054
Step 7: 3054 + 509 = 3563
Step 8: 3563 + 509 = 4072
Step 9: 4072 + 509 = 4581
Step 10: 4581 + 509 = 5090
Step 11: 5090 + 509 = 5599
Step 12: 5599 + 509 = 6108
Step 13: 6108 + 509 = 6617
Step 14: 6617 + 509 = 7126
Step 15: 7126 + 509 = 7635
Step 16: 7635 + 509 = 8144
Step 17: 8144 + 509 = 8653
Step 18: 8653 + 509 = 9162
Step 19: 9162 + 509 = 9671
Step 20: 9671 + 509 = 10180
Step 21: 10180 + 509 = 10689
Step 22: 10689 + 509 = 11198
Step 23: 11198 + 509 = 11707
Step 24: 11707 + 509 = 12216
Step 25: 12216 + 509 = 12725
Step 26: 12725 + 509 = 13234
Step 27: 13234 + 509 = 13743
Step 28: 13743 + 509 = 14252
Step 29: 14252 + 509 = 14761
Step 30: 14761 + 509 = 15270
Step 31: 15270 + 509 = 15779
Step 32: 15779 + 509 = 16288
Step 33: 16288 + 509 = 16797
Step 34: 16797 + 509 = 17306
Step 35: 17306 + 509 = 17815
Step 36: 17815 + 509 = 18324
Step 37: 18324 + 509 = 18833
Step 38: 18833 + 509 = 19342
Step 39: 19342 + 509 = 19851
Step 40: 19851 + 509 = 20360
Step 41: 20360 + 509 = 20869
Step 42: 20869 + 509 = 21378
Step 43: 21378 + 509 = 21887
Step 44: 21887 + 509 = 22396
Step 45: 22396 + 509 = 22905
Step 46: 22905 + 509 = 23414
Step 47: 23414 + 509 = 23923
Step 48: 23923 + 509 = 24432
Step 49: 24432 + 509 = 24941
Step 50: 24941 + 509 = 25450
Step 51: 25450 + 509 = 25959
Step 52: 25959 + 509 = 26468
Step 53: 26468 + 509 = 26977
Step 54: 26977 + 509 = 27486
Step 55: 27486 + 509 = 27995
Step 56: 27995 + 509 = 28504
Step 57: 28504 + 509 = 29013
Step 58: 29013 + 509 = 29522
Step 59: 29522 + 509 = 30031
Step 60: 30031 + 509 = 30540
Step 61: 30540 + 509 = 31049
Step 62: 31049 + 509 = 31558
Step 63: 31558 + 509 = 32067
Step 64: 32067 + 509 = 32576
Step 65: 32576 + 509 = 33085
Step 66: 33085 + 509 = 33594
Step 67: 33594 + 509 = 34103
Step 68: 34103 + 509 = 34612
Step 69: 34612 + 509 = 35121
Step 70: 35121 + 509 = 35630
Step 71: 35630 + 509 = 36139
Step 72: 36139 + 509 = 36648
Step 73: 36648 + 509 = 37157
Step 74: 37157 + 509 = 37666
Step 75: 37666 + 509 = 38175
Step 76: 38175 + 509 = 38684
Step 77: 38684 + 509 = 39193
Step 78: 39193 + 509 = 39702
Step 79: 39702 + 509 = 40211
Step 80: 40211 + 509 = 40720
Step 81: 40720 + 509 = 41229
Step 82: 41229 + 509 = 41738
Step 83: 41738 + 509 = 42247
Step 84: 42247 + 509 = 42756
Step 85: 42756 + 509 = 43265
Step 86: 43265 + 509 = 43774
Step 87: 43774 + 509 = 44283
Step 88: 44283 + 509 = 44792
Step 89: 44792 + 509 = 45301
Step 90: 45301 + 509 = 45810
Step 91: 45810 + 509 = 46319
Step 92: 46319 + 509 = 46828
Step 93: 46828 + 509 = 47337
Step 94: 47337 + 509 = 47846
Step 95: 47846 + 509 = 48355
Step 96: 48355 + 509 = 48864
Step 97: 48864 + 509 = 49373
Step 98: 49373 + 509 = 49882
Step 99: 49882 + 509 = 50391
Step 100: 50391 + 509 = 50900
Step 101: 50900 + 509 = 51409
Step 102: 51409 + 509 = 51918
Step 103: 51918 + 509 = 52427
Step 104: 52427 + 509 = 52936
Step 105: 52936 + 509 = 53445
Step 106: 53445 + 509 = 53954
Step 107: 53954 + 509 = 54463
Step 108: 54463 + 509 = 54972
Step 109: 54972 + 509 = 55481
Step 110: 55481 + 509 = 55990
Step 111: 55990 + 509 = 56499
Step 112: 56499 + 509 = 57008
Step 113: 57008 + 509 = 57517
Step 114: 57517 + 509 = 58026
Step 115: 58026 + 509 = 58535
Step 116: 58535 + 509 = 59044
Step 117: 59044 + 509 = 59553
Step 118: 59553 + 509 = 60062
Step 119: 60062 + 509 = 60571
Step 120: 60571 + 509 = 61080
Step 121: 61080 + 509 = 61589
Step 122: 61589 + 509 = 62098
Step 123: 62098 + 509 = 62607
Step 124: 62607 + 509 = 63116
Step 125: 63116 + 509 = 63625
Step 126: 63625 + 509 = 64134
Step 127: 64134 + 509 = 64643
Step 128: 64643 + 509 = 65152
Step 129: 65152 + 509 = 65661
Step 130: 65661 + 509 = 66170
Step 131: 66170 + 509 = 66679
Step 132: 66679 + 509 = 67188
Step 133: 67188 + 509 = 67697
Step 134: 67697 + 509 = 68206
Step 135: 68206 + 509 = 68715
Step 136: 68715 + 509 = 69224
Step 137: 69224 + 509 = 69733
Step 138: 69733 + 509 = 70242
Step 139: 70242 + 509 = 70751
Step 140: 70751 + 509 = 71260
Step 141: 71260 + 509 = 71769
Step 142: 71769 + 509 = 72278
Step 143: 72278 + 509 = 72787
Step 144: 72787 + 509 = 73296
Step 145: 73296 + 509 = 73805
Step 146: 73805 + 509 = 74314
Step 147: 74314 + 509 = 74823
Step 148: 74823 + 509 = 75332
Step 149: 75332 + 509 = 75841
Step 150: 75841 + 509 = 76350
Step 151: 76350 + 509 = 76859
Step 152: 76859 + 509 = 77368
Step 153: 77368 + 509 = 77877
Step 154: 77877 + 509 = 78386
Step 155: 78386 + 509 = 78895
Step 156: 78895 + 509 = 79404
Step 157: 79404 + 509 = 79913
Step 158: 79913 + 509 = 80422
Step 159: 80422 + 509 = 80931
Step 160: 80931 + 509 = 81440
Step 161: 81440 + 509 = 81949
Step 162: 81949 + 509 = 82458
Step 163: 82458 + 509 = 82967
Step 164: 82967 + 509 = 83476
Step 165: 83476 + 509 = 83985
Step 166: 83985 + 509 = 84494
Step 167: 84494 + 509 = 85003
Step 168: 85003 + 509 = 85512
Step 169: 85512 + 509 = 86021
Step 170: 86021 + 509 = 86530
Step 171: 86530 + 509 = 87039
Step 172: 87039 + 509 = 87548
Step 173: 87548 + 509 = 88057
Step 174: 88057 + 509 = 88566
Step 175: 88566 + 509 = 89075
Step 176: 89075 + 509 = 89584
Step 177: 89584 + 509 = 90093
Step 178: 90093 + 509 = 90602
Step 179: 90602 + 509 = 91111
Step 180: 91111 + 509 = 91620
Step 181: 91620 + 509 = 92129
Step 182: 92129 + 509 = 92638
Step 183: 92638 + 509 = 93147
Step 184: 93147 + 509 = 93656
Step 185: 93656 + 509 = 94165
Step 186: 94165 + 509 = 94674
Step 187: 94674 + 509 = 95183
Step 188: 95183 + 509 = 95692
Step 189: 95692 + 509 = 96201
Step 190: 96201 + 509 = 96710
Step 191: 96710 + 509 = 97219
Step 192: 97219 + 509 = 97728
Step 193: 97728 + 509 = 98237
Step 194: 98237 + 509 = 98746
Step 195: 98746 + 509 = 99255
Step 196: 99255 + 509 = 99764
Step 197: 99764 + 509 = 100273
Step 198: 100273 + 509 = 100782
Step 199: 100782 + 509 = 101291
Step 200: 101291 + 509 = 101800
Step 201: 101800 + 509 = 102309
Step 202: 102309 + 509 = 102818
Step 203: 102818 + 509 = 103327
Step 204: 103327 + 509 = 103836
Step 205: 103836 + 509 = 104345
Step 206: 104345 + 509 = 104854
Step 207: 104854 + 509 = 105363
Step 208: 105363 + 509 = 105872
Step 209: 105872 + 509 = 106381
Step 210: 106381 + 509 = 106890
Step 211: 106890 + 509 = 107399
Step 212: 107399 + 509 = 107908
Step 213: 107908 + 509 = 108417
Step 214: 108417 + 509 = 108926
Step 215: 108926 + 509 = 109435
Step 216: 109435 + 509 = 109944
Step 217: 109944 + 509 = 110453
Step 218: 110453 + 509 = 110962
Step 219: 110962 + 509 = 111471
Step 220: 111471 + 509 = 111980
Step 221: 111980 + 509 = 112489
Step 222: 112489 + 509 = 112998
Step 223: 112998 + 509 = 113507
Step 224: 113507 + 509 = 114016
Step 225: 114016 + 509 = 114525
Step 226: 114525 + 509 = 115034
Step 227: 115034 + 509 = 115543
Step 228: 115543 + 509 = 116052
Step 229: 116052 + 509 = 116561
Step 230: 116561 + 509 = 117070
Step 231: 117070 + 509 = 117579
Step 232: 117579 + 509 = 118088
Step 233: 118088 + 509 = 118597
Step 234: 118597 + 509 = 119106
Step 235: 119106 + 509 = 119615
Step 236: 119615 + 509 = 120124
Step 237: 120124 + 509 = 120633
Step 238: 120633 + 509 = 121142
Step 239: 121142 + 509 = 121651
Step 240: 121651 + 509 = 122160
Step 241: 122160 + 509 = 122669
Step 242: 122669 + 509 = 123178
Step 243: 123178 + 509 = 123687
Step 244: 123687 + 509 = 124196
Step 245: 124196 + 509 = 124705
Step 246: 124705 + 509 = 125214
Step 247: 125214 + 509 = 125723
Step 248: 125723 + 509 = 126232
Step 249: 126232 + 509 = 126741
Step 250: 126741 + 509 = 127250
Step 251: 127250 + 509 = 127759
Step 252: 127759 + 509 = 128268
Step 253: 128268 + 509 = 128777
Step 254: 128777 + 509 = 129286
Step 255: 129286 + 509 = 129795
Step 256: 129795 + 509 = 130304
Step 257: 130304 + 509 = 130813
Step 258: 130813 + 509 = 131322
Step 259: 131322 + 509 = 131831
Step 260: 131831 + 509 = 132340
Step 261: 132340 + 509 = 132849
Step 262: 132849 + 509 = 133358
Step 263: 133358 + 509 = 133867
Step 264: 133867 + 509 = 134376
Step 265: 134376 + 509 = 134885
Step 266: 134885 + 509 = 135394
Step 267: 135394 + 509 = 135903
Step 268: 135903 + 509 = 136412
Step 269: 136412 + 509 = 136921
Step 270: 136921 + 509 = 137430
Step 271: 137430 + 509 = 137939
Step 272: 137939 + 509 = 138448
Step 273: 138448 + 509 = 138957
Step 274: 138957 + 509 = 139466
Step 275: 139466 + 509 = 139975
Step 276: 139975 + 509 = 140484
Step 277: 140484 + 509 = 140993
Step 278: 140993 + 509 = 141502
Step 279: 141502 + 509 = 142011
Step 280: 142011 + 509 = 142520
Step 281: 142520 + 509 = 143029
Step 282: 143029 + 509 = 143538
Step 283: 143538 + 509 = 144047
Step 284: 144047 + 509 = 144556
Step 285: 144556 + 509 = 145065
Step 286: 145065 + 509 = 145574
Step 287: 145574 + 509 = 146083
Step 288: 146083 + 509 = 146592
Step 289: 146592 + 509 = 147101
Step 290: 147101 + 509 = 147610
Step 291: 147610 + 509 = 148119
Step 292: 148119 + 509 = 148628
Step 293: 148628 + 509 = 149137
Step 294: 149137 + 509 = 149646
Step 295: 149646 + 509 = 150155
Step 296: 150155 + 509 = 150664
Step 297: 150664 + 509 = 151173
Step 298: 151173 + 509 = 151682
Step 299: 151682 + 509 = 152191
Step 300: 152191 + 509 = 152700
Step 301: 152700 + 509 = 153209
Step 302: 153209 + 509 = 153718
Step 303: 153718 + 509 = 154227
Step 304: 154227 + 509 = 154736
Step 305: 154736 + 509 = 155245
Step 306: 155245 + 509 = 155754
Step 307: 155754 + 509 = 156263
Step 308: 156263 + 509 = 156772
Step 309: 156772 + 509 = 157281
Step 310: 157281 + 509 = 157790
Step 311: 157790 + 509 = 158299
Step 312: 158299 + 509 = 158808
Step 313: 158808 + 509 = 159317
Step 314: 159317 + 509 = 159826
Step 315: 159826 + 509 = 160335
Step 316: 160335 + 509 = 160844
Step 317: 160844 + 509 = 161353
Step 318: 161353 + 509 = 161862
Step 319: 161862 + 509 = 162371
Step 320: 162371 + 509 = 162880
Step 321: 162880 + 509 = 163389
Step 322: 163389 + 509 = 163898
Step 323: 163898 + 509 = 164407
Step 324: 164407 + 509 = 164916
Step 325: 164916 + 509 = 165425
Step 326: 165425 + 509 = 165934
Step 327: 165934 + 509 = 166443
Step 328: 166443 + 509 = 166952
Step 329: 166952 + 509 = 167461
Step 330: 167461 + 509 = 167970
Step 331: 167970 + 509 = 168479
Step 332: 168479 + 509 = 168988
Step 333: 168988 + 509 = 169497
Step 334: 169497 + 509 = 170006
Step 335: 170006 + 509 = 170515
Step 336: 170515 + 509 = 171024
Step 337: 171024 + 509 = 171533
Step 338: 171533 + 509 = 172042
Step 339: 172042 + 509 = 172551
Step 340: 172551 + 509 = 173060
Step 341: 173060 + 509 = 173569
Step 342: 173569 + 509 = 174078
Step 343: 174078 + 509 = 174587
Step 344: 174587 + 509 = 175096
Step 345: 175096 + 509 = 175605
Step 346: 175605 + 509 = 176114
Step 347: 176114 + 509 = 176623
Step 348: 176623 + 509 = 177132
Step 349: 177132 + 509 = 177641
Step 350: 177641 + 509 = 178150
Step 351: 178150 + 509 = 178659
Step 352: 178659 + 509 = 179168
Step 353: 179168 + 509 = 179677
Step 354: 179677 + 509 = 180186
Step 355: 180186 + 509 = 180695
Step 356: 180695 + 509 = 181204
Step 357: 181204 + 509 = 181713
Step 358: 181713 + 509 = 182222
Step 359: 182222 + 509 = 182731
Step 360: 182731 + 509 = 183240
Step 361: 183240 + 509 = 183749
Step 362: 183749 + 509 = 184258
Step 363: 184258 + 509 = 184767
Step 364: 184767 + 509 = 185276
Step 365: 185276 + 509 = 185785
Step 366: 185785 + 509 = 186294
Step 367: 186294 + 509 = 186803
Step 368: 186803 + 509 = 187312
Step 369: 187312 + 509 = 187821
Step 370: 187821 + 509 = 188330
Step 371: 188330 + 509 = 188839
Step 372: 188839 + 509 = 189348
Step 373: 189348 + 509 = 189857
Step 374: 189857 + 509 = 190366
Step 375: 190366 + 509 = 190875
Step 376: 190875 + 509 = 191384
Step 377: 191384 + 509 = 191893
Step 378: 191893 + 509 = 192402
Step 379: 192402 + 509 = 192911
Step 380: 192911 + 509 = 193420
Step 381: 193420 + 509 = 193929
Step 382: 193929 + 509 = 194438
Step 383: 194438 + 509 = 194947
Step 384: 194947 + 509 = 195456
Step 385: 195456 + 509 = 195965
Step 386: 195965 + 509 = 196474
Step 387: 196474 + 509 = 196983
Step 388: 196983 + 509 = 197492
Step 389: 197492 + 509 = 198001
Step 390: 198001 + 509 = 198510
Step 391: 198510 + 509 = 199019
Step 392: 199019 + 509 = 199528

So, 509*392 = 199528