Let's roll up our sleeves and solve this. We have 785 and we're going to multiply it by 431, essentially adding 785 to itself 431 times.
Step 1: 0 + 785 = 785
Step 2: 785 + 785 = 1570
Step 3: 1570 + 785 = 2355
Step 4: 2355 + 785 = 3140
Step 5: 3140 + 785 = 3925
Step 6: 3925 + 785 = 4710
Step 7: 4710 + 785 = 5495
Step 8: 5495 + 785 = 6280
Step 9: 6280 + 785 = 7065
Step 10: 7065 + 785 = 7850
Step 11: 7850 + 785 = 8635
Step 12: 8635 + 785 = 9420
Step 13: 9420 + 785 = 10205
Step 14: 10205 + 785 = 10990
Step 15: 10990 + 785 = 11775
Step 16: 11775 + 785 = 12560
Step 17: 12560 + 785 = 13345
Step 18: 13345 + 785 = 14130
Step 19: 14130 + 785 = 14915
Step 20: 14915 + 785 = 15700
Step 21: 15700 + 785 = 16485
Step 22: 16485 + 785 = 17270
Step 23: 17270 + 785 = 18055
Step 24: 18055 + 785 = 18840
Step 25: 18840 + 785 = 19625
Step 26: 19625 + 785 = 20410
Step 27: 20410 + 785 = 21195
Step 28: 21195 + 785 = 21980
Step 29: 21980 + 785 = 22765
Step 30: 22765 + 785 = 23550
Step 31: 23550 + 785 = 24335
Step 32: 24335 + 785 = 25120
Step 33: 25120 + 785 = 25905
Step 34: 25905 + 785 = 26690
Step 35: 26690 + 785 = 27475
Step 36: 27475 + 785 = 28260
Step 37: 28260 + 785 = 29045
Step 38: 29045 + 785 = 29830
Step 39: 29830 + 785 = 30615
Step 40: 30615 + 785 = 31400
Step 41: 31400 + 785 = 32185
Step 42: 32185 + 785 = 32970
Step 43: 32970 + 785 = 33755
Step 44: 33755 + 785 = 34540
Step 45: 34540 + 785 = 35325
Step 46: 35325 + 785 = 36110
Step 47: 36110 + 785 = 36895
Step 48: 36895 + 785 = 37680
Step 49: 37680 + 785 = 38465
Step 50: 38465 + 785 = 39250
Step 51: 39250 + 785 = 40035
Step 52: 40035 + 785 = 40820
Step 53: 40820 + 785 = 41605
Step 54: 41605 + 785 = 42390
Step 55: 42390 + 785 = 43175
Step 56: 43175 + 785 = 43960
Step 57: 43960 + 785 = 44745
Step 58: 44745 + 785 = 45530
Step 59: 45530 + 785 = 46315
Step 60: 46315 + 785 = 47100
Step 61: 47100 + 785 = 47885
Step 62: 47885 + 785 = 48670
Step 63: 48670 + 785 = 49455
Step 64: 49455 + 785 = 50240
Step 65: 50240 + 785 = 51025
Step 66: 51025 + 785 = 51810
Step 67: 51810 + 785 = 52595
Step 68: 52595 + 785 = 53380
Step 69: 53380 + 785 = 54165
Step 70: 54165 + 785 = 54950
Step 71: 54950 + 785 = 55735
Step 72: 55735 + 785 = 56520
Step 73: 56520 + 785 = 57305
Step 74: 57305 + 785 = 58090
Step 75: 58090 + 785 = 58875
Step 76: 58875 + 785 = 59660
Step 77: 59660 + 785 = 60445
Step 78: 60445 + 785 = 61230
Step 79: 61230 + 785 = 62015
Step 80: 62015 + 785 = 62800
Step 81: 62800 + 785 = 63585
Step 82: 63585 + 785 = 64370
Step 83: 64370 + 785 = 65155
Step 84: 65155 + 785 = 65940
Step 85: 65940 + 785 = 66725
Step 86: 66725 + 785 = 67510
Step 87: 67510 + 785 = 68295
Step 88: 68295 + 785 = 69080
Step 89: 69080 + 785 = 69865
Step 90: 69865 + 785 = 70650
Step 91: 70650 + 785 = 71435
Step 92: 71435 + 785 = 72220
Step 93: 72220 + 785 = 73005
Step 94: 73005 + 785 = 73790
Step 95: 73790 + 785 = 74575
Step 96: 74575 + 785 = 75360
Step 97: 75360 + 785 = 76145
Step 98: 76145 + 785 = 76930
Step 99: 76930 + 785 = 77715
Step 100: 77715 + 785 = 78500
Step 101: 78500 + 785 = 79285
Step 102: 79285 + 785 = 80070
Step 103: 80070 + 785 = 80855
Step 104: 80855 + 785 = 81640
Step 105: 81640 + 785 = 82425
Step 106: 82425 + 785 = 83210
Step 107: 83210 + 785 = 83995
Step 108: 83995 + 785 = 84780
Step 109: 84780 + 785 = 85565
Step 110: 85565 + 785 = 86350
Step 111: 86350 + 785 = 87135
Step 112: 87135 + 785 = 87920
Step 113: 87920 + 785 = 88705
Step 114: 88705 + 785 = 89490
Step 115: 89490 + 785 = 90275
Step 116: 90275 + 785 = 91060
Step 117: 91060 + 785 = 91845
Step 118: 91845 + 785 = 92630
Step 119: 92630 + 785 = 93415
Step 120: 93415 + 785 = 94200
Step 121: 94200 + 785 = 94985
Step 122: 94985 + 785 = 95770
Step 123: 95770 + 785 = 96555
Step 124: 96555 + 785 = 97340
Step 125: 97340 + 785 = 98125
Step 126: 98125 + 785 = 98910
Step 127: 98910 + 785 = 99695
Step 128: 99695 + 785 = 100480
Step 129: 100480 + 785 = 101265
Step 130: 101265 + 785 = 102050
Step 131: 102050 + 785 = 102835
Step 132: 102835 + 785 = 103620
Step 133: 103620 + 785 = 104405
Step 134: 104405 + 785 = 105190
Step 135: 105190 + 785 = 105975
Step 136: 105975 + 785 = 106760
Step 137: 106760 + 785 = 107545
Step 138: 107545 + 785 = 108330
Step 139: 108330 + 785 = 109115
Step 140: 109115 + 785 = 109900
Step 141: 109900 + 785 = 110685
Step 142: 110685 + 785 = 111470
Step 143: 111470 + 785 = 112255
Step 144: 112255 + 785 = 113040
Step 145: 113040 + 785 = 113825
Step 146: 113825 + 785 = 114610
Step 147: 114610 + 785 = 115395
Step 148: 115395 + 785 = 116180
Step 149: 116180 + 785 = 116965
Step 150: 116965 + 785 = 117750
Step 151: 117750 + 785 = 118535
Step 152: 118535 + 785 = 119320
Step 153: 119320 + 785 = 120105
Step 154: 120105 + 785 = 120890
Step 155: 120890 + 785 = 121675
Step 156: 121675 + 785 = 122460
Step 157: 122460 + 785 = 123245
Step 158: 123245 + 785 = 124030
Step 159: 124030 + 785 = 124815
Step 160: 124815 + 785 = 125600
Step 161: 125600 + 785 = 126385
Step 162: 126385 + 785 = 127170
Step 163: 127170 + 785 = 127955
Step 164: 127955 + 785 = 128740
Step 165: 128740 + 785 = 129525
Step 166: 129525 + 785 = 130310
Step 167: 130310 + 785 = 131095
Step 168: 131095 + 785 = 131880
Step 169: 131880 + 785 = 132665
Step 170: 132665 + 785 = 133450
Step 171: 133450 + 785 = 134235
Step 172: 134235 + 785 = 135020
Step 173: 135020 + 785 = 135805
Step 174: 135805 + 785 = 136590
Step 175: 136590 + 785 = 137375
Step 176: 137375 + 785 = 138160
Step 177: 138160 + 785 = 138945
Step 178: 138945 + 785 = 139730
Step 179: 139730 + 785 = 140515
Step 180: 140515 + 785 = 141300
Step 181: 141300 + 785 = 142085
Step 182: 142085 + 785 = 142870
Step 183: 142870 + 785 = 143655
Step 184: 143655 + 785 = 144440
Step 185: 144440 + 785 = 145225
Step 186: 145225 + 785 = 146010
Step 187: 146010 + 785 = 146795
Step 188: 146795 + 785 = 147580
Step 189: 147580 + 785 = 148365
Step 190: 148365 + 785 = 149150
Step 191: 149150 + 785 = 149935
Step 192: 149935 + 785 = 150720
Step 193: 150720 + 785 = 151505
Step 194: 151505 + 785 = 152290
Step 195: 152290 + 785 = 153075
Step 196: 153075 + 785 = 153860
Step 197: 153860 + 785 = 154645
Step 198: 154645 + 785 = 155430
Step 199: 155430 + 785 = 156215
Step 200: 156215 + 785 = 157000
Step 201: 157000 + 785 = 157785
Step 202: 157785 + 785 = 158570
Step 203: 158570 + 785 = 159355
Step 204: 159355 + 785 = 160140
Step 205: 160140 + 785 = 160925
Step 206: 160925 + 785 = 161710
Step 207: 161710 + 785 = 162495
Step 208: 162495 + 785 = 163280
Step 209: 163280 + 785 = 164065
Step 210: 164065 + 785 = 164850
Step 211: 164850 + 785 = 165635
Step 212: 165635 + 785 = 166420
Step 213: 166420 + 785 = 167205
Step 214: 167205 + 785 = 167990
Step 215: 167990 + 785 = 168775
Step 216: 168775 + 785 = 169560
Step 217: 169560 + 785 = 170345
Step 218: 170345 + 785 = 171130
Step 219: 171130 + 785 = 171915
Step 220: 171915 + 785 = 172700
Step 221: 172700 + 785 = 173485
Step 222: 173485 + 785 = 174270
Step 223: 174270 + 785 = 175055
Step 224: 175055 + 785 = 175840
Step 225: 175840 + 785 = 176625
Step 226: 176625 + 785 = 177410
Step 227: 177410 + 785 = 178195
Step 228: 178195 + 785 = 178980
Step 229: 178980 + 785 = 179765
Step 230: 179765 + 785 = 180550
Step 231: 180550 + 785 = 181335
Step 232: 181335 + 785 = 182120
Step 233: 182120 + 785 = 182905
Step 234: 182905 + 785 = 183690
Step 235: 183690 + 785 = 184475
Step 236: 184475 + 785 = 185260
Step 237: 185260 + 785 = 186045
Step 238: 186045 + 785 = 186830
Step 239: 186830 + 785 = 187615
Step 240: 187615 + 785 = 188400
Step 241: 188400 + 785 = 189185
Step 242: 189185 + 785 = 189970
Step 243: 189970 + 785 = 190755
Step 244: 190755 + 785 = 191540
Step 245: 191540 + 785 = 192325
Step 246: 192325 + 785 = 193110
Step 247: 193110 + 785 = 193895
Step 248: 193895 + 785 = 194680
Step 249: 194680 + 785 = 195465
Step 250: 195465 + 785 = 196250
Step 251: 196250 + 785 = 197035
Step 252: 197035 + 785 = 197820
Step 253: 197820 + 785 = 198605
Step 254: 198605 + 785 = 199390
Step 255: 199390 + 785 = 200175
Step 256: 200175 + 785 = 200960
Step 257: 200960 + 785 = 201745
Step 258: 201745 + 785 = 202530
Step 259: 202530 + 785 = 203315
Step 260: 203315 + 785 = 204100
Step 261: 204100 + 785 = 204885
Step 262: 204885 + 785 = 205670
Step 263: 205670 + 785 = 206455
Step 264: 206455 + 785 = 207240
Step 265: 207240 + 785 = 208025
Step 266: 208025 + 785 = 208810
Step 267: 208810 + 785 = 209595
Step 268: 209595 + 785 = 210380
Step 269: 210380 + 785 = 211165
Step 270: 211165 + 785 = 211950
Step 271: 211950 + 785 = 212735
Step 272: 212735 + 785 = 213520
Step 273: 213520 + 785 = 214305
Step 274: 214305 + 785 = 215090
Step 275: 215090 + 785 = 215875
Step 276: 215875 + 785 = 216660
Step 277: 216660 + 785 = 217445
Step 278: 217445 + 785 = 218230
Step 279: 218230 + 785 = 219015
Step 280: 219015 + 785 = 219800
Step 281: 219800 + 785 = 220585
Step 282: 220585 + 785 = 221370
Step 283: 221370 + 785 = 222155
Step 284: 222155 + 785 = 222940
Step 285: 222940 + 785 = 223725
Step 286: 223725 + 785 = 224510
Step 287: 224510 + 785 = 225295
Step 288: 225295 + 785 = 226080
Step 289: 226080 + 785 = 226865
Step 290: 226865 + 785 = 227650
Step 291: 227650 + 785 = 228435
Step 292: 228435 + 785 = 229220
Step 293: 229220 + 785 = 230005
Step 294: 230005 + 785 = 230790
Step 295: 230790 + 785 = 231575
Step 296: 231575 + 785 = 232360
Step 297: 232360 + 785 = 233145
Step 298: 233145 + 785 = 233930
Step 299: 233930 + 785 = 234715
Step 300: 234715 + 785 = 235500
Step 301: 235500 + 785 = 236285
Step 302: 236285 + 785 = 237070
Step 303: 237070 + 785 = 237855
Step 304: 237855 + 785 = 238640
Step 305: 238640 + 785 = 239425
Step 306: 239425 + 785 = 240210
Step 307: 240210 + 785 = 240995
Step 308: 240995 + 785 = 241780
Step 309: 241780 + 785 = 242565
Step 310: 242565 + 785 = 243350
Step 311: 243350 + 785 = 244135
Step 312: 244135 + 785 = 244920
Step 313: 244920 + 785 = 245705
Step 314: 245705 + 785 = 246490
Step 315: 246490 + 785 = 247275
Step 316: 247275 + 785 = 248060
Step 317: 248060 + 785 = 248845
Step 318: 248845 + 785 = 249630
Step 319: 249630 + 785 = 250415
Step 320: 250415 + 785 = 251200
Step 321: 251200 + 785 = 251985
Step 322: 251985 + 785 = 252770
Step 323: 252770 + 785 = 253555
Step 324: 253555 + 785 = 254340
Step 325: 254340 + 785 = 255125
Step 326: 255125 + 785 = 255910
Step 327: 255910 + 785 = 256695
Step 328: 256695 + 785 = 257480
Step 329: 257480 + 785 = 258265
Step 330: 258265 + 785 = 259050
Step 331: 259050 + 785 = 259835
Step 332: 259835 + 785 = 260620
Step 333: 260620 + 785 = 261405
Step 334: 261405 + 785 = 262190
Step 335: 262190 + 785 = 262975
Step 336: 262975 + 785 = 263760
Step 337: 263760 + 785 = 264545
Step 338: 264545 + 785 = 265330
Step 339: 265330 + 785 = 266115
Step 340: 266115 + 785 = 266900
Step 341: 266900 + 785 = 267685
Step 342: 267685 + 785 = 268470
Step 343: 268470 + 785 = 269255
Step 344: 269255 + 785 = 270040
Step 345: 270040 + 785 = 270825
Step 346: 270825 + 785 = 271610
Step 347: 271610 + 785 = 272395
Step 348: 272395 + 785 = 273180
Step 349: 273180 + 785 = 273965
Step 350: 273965 + 785 = 274750
Step 351: 274750 + 785 = 275535
Step 352: 275535 + 785 = 276320
Step 353: 276320 + 785 = 277105
Step 354: 277105 + 785 = 277890
Step 355: 277890 + 785 = 278675
Step 356: 278675 + 785 = 279460
Step 357: 279460 + 785 = 280245
Step 358: 280245 + 785 = 281030
Step 359: 281030 + 785 = 281815
Step 360: 281815 + 785 = 282600
Step 361: 282600 + 785 = 283385
Step 362: 283385 + 785 = 284170
Step 363: 284170 + 785 = 284955
Step 364: 284955 + 785 = 285740
Step 365: 285740 + 785 = 286525
Step 366: 286525 + 785 = 287310
Step 367: 287310 + 785 = 288095
Step 368: 288095 + 785 = 288880
Step 369: 288880 + 785 = 289665
Step 370: 289665 + 785 = 290450
Step 371: 290450 + 785 = 291235
Step 372: 291235 + 785 = 292020
Step 373: 292020 + 785 = 292805
Step 374: 292805 + 785 = 293590
Step 375: 293590 + 785 = 294375
Step 376: 294375 + 785 = 295160
Step 377: 295160 + 785 = 295945
Step 378: 295945 + 785 = 296730
Step 379: 296730 + 785 = 297515
Step 380: 297515 + 785 = 298300
Step 381: 298300 + 785 = 299085
Step 382: 299085 + 785 = 299870
Step 383: 299870 + 785 = 300655
Step 384: 300655 + 785 = 301440
Step 385: 301440 + 785 = 302225
Step 386: 302225 + 785 = 303010
Step 387: 303010 + 785 = 303795
Step 388: 303795 + 785 = 304580
Step 389: 304580 + 785 = 305365
Step 390: 305365 + 785 = 306150
Step 391: 306150 + 785 = 306935
Step 392: 306935 + 785 = 307720
Step 393: 307720 + 785 = 308505
Step 394: 308505 + 785 = 309290
Step 395: 309290 + 785 = 310075
Step 396: 310075 + 785 = 310860
Step 397: 310860 + 785 = 311645
Step 398: 311645 + 785 = 312430
Step 399: 312430 + 785 = 313215
Step 400: 313215 + 785 = 314000
Step 401: 314000 + 785 = 314785
Step 402: 314785 + 785 = 315570
Step 403: 315570 + 785 = 316355
Step 404: 316355 + 785 = 317140
Step 405: 317140 + 785 = 317925
Step 406: 317925 + 785 = 318710
Step 407: 318710 + 785 = 319495
Step 408: 319495 + 785 = 320280
Step 409: 320280 + 785 = 321065
Step 410: 321065 + 785 = 321850
Step 411: 321850 + 785 = 322635
Step 412: 322635 + 785 = 323420
Step 413: 323420 + 785 = 324205
Step 414: 324205 + 785 = 324990
Step 415: 324990 + 785 = 325775
Step 416: 325775 + 785 = 326560
Step 417: 326560 + 785 = 327345
Step 418: 327345 + 785 = 328130
Step 419: 328130 + 785 = 328915
Step 420: 328915 + 785 = 329700
Step 421: 329700 + 785 = 330485
Step 422: 330485 + 785 = 331270
Step 423: 331270 + 785 = 332055
Step 424: 332055 + 785 = 332840
Step 425: 332840 + 785 = 333625
Step 426: 333625 + 785 = 334410
Step 427: 334410 + 785 = 335195
Step 428: 335195 + 785 = 335980
Step 429: 335980 + 785 = 336765
Step 430: 336765 + 785 = 337550
Step 431: 337550 + 785 = 338335

So, 785*431 = 338335