Alright, let's solve this math problem step by step. First, we have the number 815. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 434. So, we're going to take the number 815 and add it to itself 434 times.
Step 1: 0 + 815 = 815
Step 2: 815 + 815 = 1630
Step 3: 1630 + 815 = 2445
Step 4: 2445 + 815 = 3260
Step 5: 3260 + 815 = 4075
Step 6: 4075 + 815 = 4890
Step 7: 4890 + 815 = 5705
Step 8: 5705 + 815 = 6520
Step 9: 6520 + 815 = 7335
Step 10: 7335 + 815 = 8150
Step 11: 8150 + 815 = 8965
Step 12: 8965 + 815 = 9780
Step 13: 9780 + 815 = 10595
Step 14: 10595 + 815 = 11410
Step 15: 11410 + 815 = 12225
Step 16: 12225 + 815 = 13040
Step 17: 13040 + 815 = 13855
Step 18: 13855 + 815 = 14670
Step 19: 14670 + 815 = 15485
Step 20: 15485 + 815 = 16300
Step 21: 16300 + 815 = 17115
Step 22: 17115 + 815 = 17930
Step 23: 17930 + 815 = 18745
Step 24: 18745 + 815 = 19560
Step 25: 19560 + 815 = 20375
Step 26: 20375 + 815 = 21190
Step 27: 21190 + 815 = 22005
Step 28: 22005 + 815 = 22820
Step 29: 22820 + 815 = 23635
Step 30: 23635 + 815 = 24450
Step 31: 24450 + 815 = 25265
Step 32: 25265 + 815 = 26080
Step 33: 26080 + 815 = 26895
Step 34: 26895 + 815 = 27710
Step 35: 27710 + 815 = 28525
Step 36: 28525 + 815 = 29340
Step 37: 29340 + 815 = 30155
Step 38: 30155 + 815 = 30970
Step 39: 30970 + 815 = 31785
Step 40: 31785 + 815 = 32600
Step 41: 32600 + 815 = 33415
Step 42: 33415 + 815 = 34230
Step 43: 34230 + 815 = 35045
Step 44: 35045 + 815 = 35860
Step 45: 35860 + 815 = 36675
Step 46: 36675 + 815 = 37490
Step 47: 37490 + 815 = 38305
Step 48: 38305 + 815 = 39120
Step 49: 39120 + 815 = 39935
Step 50: 39935 + 815 = 40750
Step 51: 40750 + 815 = 41565
Step 52: 41565 + 815 = 42380
Step 53: 42380 + 815 = 43195
Step 54: 43195 + 815 = 44010
Step 55: 44010 + 815 = 44825
Step 56: 44825 + 815 = 45640
Step 57: 45640 + 815 = 46455
Step 58: 46455 + 815 = 47270
Step 59: 47270 + 815 = 48085
Step 60: 48085 + 815 = 48900
Step 61: 48900 + 815 = 49715
Step 62: 49715 + 815 = 50530
Step 63: 50530 + 815 = 51345
Step 64: 51345 + 815 = 52160
Step 65: 52160 + 815 = 52975
Step 66: 52975 + 815 = 53790
Step 67: 53790 + 815 = 54605
Step 68: 54605 + 815 = 55420
Step 69: 55420 + 815 = 56235
Step 70: 56235 + 815 = 57050
Step 71: 57050 + 815 = 57865
Step 72: 57865 + 815 = 58680
Step 73: 58680 + 815 = 59495
Step 74: 59495 + 815 = 60310
Step 75: 60310 + 815 = 61125
Step 76: 61125 + 815 = 61940
Step 77: 61940 + 815 = 62755
Step 78: 62755 + 815 = 63570
Step 79: 63570 + 815 = 64385
Step 80: 64385 + 815 = 65200
Step 81: 65200 + 815 = 66015
Step 82: 66015 + 815 = 66830
Step 83: 66830 + 815 = 67645
Step 84: 67645 + 815 = 68460
Step 85: 68460 + 815 = 69275
Step 86: 69275 + 815 = 70090
Step 87: 70090 + 815 = 70905
Step 88: 70905 + 815 = 71720
Step 89: 71720 + 815 = 72535
Step 90: 72535 + 815 = 73350
Step 91: 73350 + 815 = 74165
Step 92: 74165 + 815 = 74980
Step 93: 74980 + 815 = 75795
Step 94: 75795 + 815 = 76610
Step 95: 76610 + 815 = 77425
Step 96: 77425 + 815 = 78240
Step 97: 78240 + 815 = 79055
Step 98: 79055 + 815 = 79870
Step 99: 79870 + 815 = 80685
Step 100: 80685 + 815 = 81500
Step 101: 81500 + 815 = 82315
Step 102: 82315 + 815 = 83130
Step 103: 83130 + 815 = 83945
Step 104: 83945 + 815 = 84760
Step 105: 84760 + 815 = 85575
Step 106: 85575 + 815 = 86390
Step 107: 86390 + 815 = 87205
Step 108: 87205 + 815 = 88020
Step 109: 88020 + 815 = 88835
Step 110: 88835 + 815 = 89650
Step 111: 89650 + 815 = 90465
Step 112: 90465 + 815 = 91280
Step 113: 91280 + 815 = 92095
Step 114: 92095 + 815 = 92910
Step 115: 92910 + 815 = 93725
Step 116: 93725 + 815 = 94540
Step 117: 94540 + 815 = 95355
Step 118: 95355 + 815 = 96170
Step 119: 96170 + 815 = 96985
Step 120: 96985 + 815 = 97800
Step 121: 97800 + 815 = 98615
Step 122: 98615 + 815 = 99430
Step 123: 99430 + 815 = 100245
Step 124: 100245 + 815 = 101060
Step 125: 101060 + 815 = 101875
Step 126: 101875 + 815 = 102690
Step 127: 102690 + 815 = 103505
Step 128: 103505 + 815 = 104320
Step 129: 104320 + 815 = 105135
Step 130: 105135 + 815 = 105950
Step 131: 105950 + 815 = 106765
Step 132: 106765 + 815 = 107580
Step 133: 107580 + 815 = 108395
Step 134: 108395 + 815 = 109210
Step 135: 109210 + 815 = 110025
Step 136: 110025 + 815 = 110840
Step 137: 110840 + 815 = 111655
Step 138: 111655 + 815 = 112470
Step 139: 112470 + 815 = 113285
Step 140: 113285 + 815 = 114100
Step 141: 114100 + 815 = 114915
Step 142: 114915 + 815 = 115730
Step 143: 115730 + 815 = 116545
Step 144: 116545 + 815 = 117360
Step 145: 117360 + 815 = 118175
Step 146: 118175 + 815 = 118990
Step 147: 118990 + 815 = 119805
Step 148: 119805 + 815 = 120620
Step 149: 120620 + 815 = 121435
Step 150: 121435 + 815 = 122250
Step 151: 122250 + 815 = 123065
Step 152: 123065 + 815 = 123880
Step 153: 123880 + 815 = 124695
Step 154: 124695 + 815 = 125510
Step 155: 125510 + 815 = 126325
Step 156: 126325 + 815 = 127140
Step 157: 127140 + 815 = 127955
Step 158: 127955 + 815 = 128770
Step 159: 128770 + 815 = 129585
Step 160: 129585 + 815 = 130400
Step 161: 130400 + 815 = 131215
Step 162: 131215 + 815 = 132030
Step 163: 132030 + 815 = 132845
Step 164: 132845 + 815 = 133660
Step 165: 133660 + 815 = 134475
Step 166: 134475 + 815 = 135290
Step 167: 135290 + 815 = 136105
Step 168: 136105 + 815 = 136920
Step 169: 136920 + 815 = 137735
Step 170: 137735 + 815 = 138550
Step 171: 138550 + 815 = 139365
Step 172: 139365 + 815 = 140180
Step 173: 140180 + 815 = 140995
Step 174: 140995 + 815 = 141810
Step 175: 141810 + 815 = 142625
Step 176: 142625 + 815 = 143440
Step 177: 143440 + 815 = 144255
Step 178: 144255 + 815 = 145070
Step 179: 145070 + 815 = 145885
Step 180: 145885 + 815 = 146700
Step 181: 146700 + 815 = 147515
Step 182: 147515 + 815 = 148330
Step 183: 148330 + 815 = 149145
Step 184: 149145 + 815 = 149960
Step 185: 149960 + 815 = 150775
Step 186: 150775 + 815 = 151590
Step 187: 151590 + 815 = 152405
Step 188: 152405 + 815 = 153220
Step 189: 153220 + 815 = 154035
Step 190: 154035 + 815 = 154850
Step 191: 154850 + 815 = 155665
Step 192: 155665 + 815 = 156480
Step 193: 156480 + 815 = 157295
Step 194: 157295 + 815 = 158110
Step 195: 158110 + 815 = 158925
Step 196: 158925 + 815 = 159740
Step 197: 159740 + 815 = 160555
Step 198: 160555 + 815 = 161370
Step 199: 161370 + 815 = 162185
Step 200: 162185 + 815 = 163000
Step 201: 163000 + 815 = 163815
Step 202: 163815 + 815 = 164630
Step 203: 164630 + 815 = 165445
Step 204: 165445 + 815 = 166260
Step 205: 166260 + 815 = 167075
Step 206: 167075 + 815 = 167890
Step 207: 167890 + 815 = 168705
Step 208: 168705 + 815 = 169520
Step 209: 169520 + 815 = 170335
Step 210: 170335 + 815 = 171150
Step 211: 171150 + 815 = 171965
Step 212: 171965 + 815 = 172780
Step 213: 172780 + 815 = 173595
Step 214: 173595 + 815 = 174410
Step 215: 174410 + 815 = 175225
Step 216: 175225 + 815 = 176040
Step 217: 176040 + 815 = 176855
Step 218: 176855 + 815 = 177670
Step 219: 177670 + 815 = 178485
Step 220: 178485 + 815 = 179300
Step 221: 179300 + 815 = 180115
Step 222: 180115 + 815 = 180930
Step 223: 180930 + 815 = 181745
Step 224: 181745 + 815 = 182560
Step 225: 182560 + 815 = 183375
Step 226: 183375 + 815 = 184190
Step 227: 184190 + 815 = 185005
Step 228: 185005 + 815 = 185820
Step 229: 185820 + 815 = 186635
Step 230: 186635 + 815 = 187450
Step 231: 187450 + 815 = 188265
Step 232: 188265 + 815 = 189080
Step 233: 189080 + 815 = 189895
Step 234: 189895 + 815 = 190710
Step 235: 190710 + 815 = 191525
Step 236: 191525 + 815 = 192340
Step 237: 192340 + 815 = 193155
Step 238: 193155 + 815 = 193970
Step 239: 193970 + 815 = 194785
Step 240: 194785 + 815 = 195600
Step 241: 195600 + 815 = 196415
Step 242: 196415 + 815 = 197230
Step 243: 197230 + 815 = 198045
Step 244: 198045 + 815 = 198860
Step 245: 198860 + 815 = 199675
Step 246: 199675 + 815 = 200490
Step 247: 200490 + 815 = 201305
Step 248: 201305 + 815 = 202120
Step 249: 202120 + 815 = 202935
Step 250: 202935 + 815 = 203750
Step 251: 203750 + 815 = 204565
Step 252: 204565 + 815 = 205380
Step 253: 205380 + 815 = 206195
Step 254: 206195 + 815 = 207010
Step 255: 207010 + 815 = 207825
Step 256: 207825 + 815 = 208640
Step 257: 208640 + 815 = 209455
Step 258: 209455 + 815 = 210270
Step 259: 210270 + 815 = 211085
Step 260: 211085 + 815 = 211900
Step 261: 211900 + 815 = 212715
Step 262: 212715 + 815 = 213530
Step 263: 213530 + 815 = 214345
Step 264: 214345 + 815 = 215160
Step 265: 215160 + 815 = 215975
Step 266: 215975 + 815 = 216790
Step 267: 216790 + 815 = 217605
Step 268: 217605 + 815 = 218420
Step 269: 218420 + 815 = 219235
Step 270: 219235 + 815 = 220050
Step 271: 220050 + 815 = 220865
Step 272: 220865 + 815 = 221680
Step 273: 221680 + 815 = 222495
Step 274: 222495 + 815 = 223310
Step 275: 223310 + 815 = 224125
Step 276: 224125 + 815 = 224940
Step 277: 224940 + 815 = 225755
Step 278: 225755 + 815 = 226570
Step 279: 226570 + 815 = 227385
Step 280: 227385 + 815 = 228200
Step 281: 228200 + 815 = 229015
Step 282: 229015 + 815 = 229830
Step 283: 229830 + 815 = 230645
Step 284: 230645 + 815 = 231460
Step 285: 231460 + 815 = 232275
Step 286: 232275 + 815 = 233090
Step 287: 233090 + 815 = 233905
Step 288: 233905 + 815 = 234720
Step 289: 234720 + 815 = 235535
Step 290: 235535 + 815 = 236350
Step 291: 236350 + 815 = 237165
Step 292: 237165 + 815 = 237980
Step 293: 237980 + 815 = 238795
Step 294: 238795 + 815 = 239610
Step 295: 239610 + 815 = 240425
Step 296: 240425 + 815 = 241240
Step 297: 241240 + 815 = 242055
Step 298: 242055 + 815 = 242870
Step 299: 242870 + 815 = 243685
Step 300: 243685 + 815 = 244500
Step 301: 244500 + 815 = 245315
Step 302: 245315 + 815 = 246130
Step 303: 246130 + 815 = 246945
Step 304: 246945 + 815 = 247760
Step 305: 247760 + 815 = 248575
Step 306: 248575 + 815 = 249390
Step 307: 249390 + 815 = 250205
Step 308: 250205 + 815 = 251020
Step 309: 251020 + 815 = 251835
Step 310: 251835 + 815 = 252650
Step 311: 252650 + 815 = 253465
Step 312: 253465 + 815 = 254280
Step 313: 254280 + 815 = 255095
Step 314: 255095 + 815 = 255910
Step 315: 255910 + 815 = 256725
Step 316: 256725 + 815 = 257540
Step 317: 257540 + 815 = 258355
Step 318: 258355 + 815 = 259170
Step 319: 259170 + 815 = 259985
Step 320: 259985 + 815 = 260800
Step 321: 260800 + 815 = 261615
Step 322: 261615 + 815 = 262430
Step 323: 262430 + 815 = 263245
Step 324: 263245 + 815 = 264060
Step 325: 264060 + 815 = 264875
Step 326: 264875 + 815 = 265690
Step 327: 265690 + 815 = 266505
Step 328: 266505 + 815 = 267320
Step 329: 267320 + 815 = 268135
Step 330: 268135 + 815 = 268950
Step 331: 268950 + 815 = 269765
Step 332: 269765 + 815 = 270580
Step 333: 270580 + 815 = 271395
Step 334: 271395 + 815 = 272210
Step 335: 272210 + 815 = 273025
Step 336: 273025 + 815 = 273840
Step 337: 273840 + 815 = 274655
Step 338: 274655 + 815 = 275470
Step 339: 275470 + 815 = 276285
Step 340: 276285 + 815 = 277100
Step 341: 277100 + 815 = 277915
Step 342: 277915 + 815 = 278730
Step 343: 278730 + 815 = 279545
Step 344: 279545 + 815 = 280360
Step 345: 280360 + 815 = 281175
Step 346: 281175 + 815 = 281990
Step 347: 281990 + 815 = 282805
Step 348: 282805 + 815 = 283620
Step 349: 283620 + 815 = 284435
Step 350: 284435 + 815 = 285250
Step 351: 285250 + 815 = 286065
Step 352: 286065 + 815 = 286880
Step 353: 286880 + 815 = 287695
Step 354: 287695 + 815 = 288510
Step 355: 288510 + 815 = 289325
Step 356: 289325 + 815 = 290140
Step 357: 290140 + 815 = 290955
Step 358: 290955 + 815 = 291770
Step 359: 291770 + 815 = 292585
Step 360: 292585 + 815 = 293400
Step 361: 293400 + 815 = 294215
Step 362: 294215 + 815 = 295030
Step 363: 295030 + 815 = 295845
Step 364: 295845 + 815 = 296660
Step 365: 296660 + 815 = 297475
Step 366: 297475 + 815 = 298290
Step 367: 298290 + 815 = 299105
Step 368: 299105 + 815 = 299920
Step 369: 299920 + 815 = 300735
Step 370: 300735 + 815 = 301550
Step 371: 301550 + 815 = 302365
Step 372: 302365 + 815 = 303180
Step 373: 303180 + 815 = 303995
Step 374: 303995 + 815 = 304810
Step 375: 304810 + 815 = 305625
Step 376: 305625 + 815 = 306440
Step 377: 306440 + 815 = 307255
Step 378: 307255 + 815 = 308070
Step 379: 308070 + 815 = 308885
Step 380: 308885 + 815 = 309700
Step 381: 309700 + 815 = 310515
Step 382: 310515 + 815 = 311330
Step 383: 311330 + 815 = 312145
Step 384: 312145 + 815 = 312960
Step 385: 312960 + 815 = 313775
Step 386: 313775 + 815 = 314590
Step 387: 314590 + 815 = 315405
Step 388: 315405 + 815 = 316220
Step 389: 316220 + 815 = 317035
Step 390: 317035 + 815 = 317850
Step 391: 317850 + 815 = 318665
Step 392: 318665 + 815 = 319480
Step 393: 319480 + 815 = 320295
Step 394: 320295 + 815 = 321110
Step 395: 321110 + 815 = 321925
Step 396: 321925 + 815 = 322740
Step 397: 322740 + 815 = 323555
Step 398: 323555 + 815 = 324370
Step 399: 324370 + 815 = 325185
Step 400: 325185 + 815 = 326000
Step 401: 326000 + 815 = 326815
Step 402: 326815 + 815 = 327630
Step 403: 327630 + 815 = 328445
Step 404: 328445 + 815 = 329260
Step 405: 329260 + 815 = 330075
Step 406: 330075 + 815 = 330890
Step 407: 330890 + 815 = 331705
Step 408: 331705 + 815 = 332520
Step 409: 332520 + 815 = 333335
Step 410: 333335 + 815 = 334150
Step 411: 334150 + 815 = 334965
Step 412: 334965 + 815 = 335780
Step 413: 335780 + 815 = 336595
Step 414: 336595 + 815 = 337410
Step 415: 337410 + 815 = 338225
Step 416: 338225 + 815 = 339040
Step 417: 339040 + 815 = 339855
Step 418: 339855 + 815 = 340670
Step 419: 340670 + 815 = 341485
Step 420: 341485 + 815 = 342300
Step 421: 342300 + 815 = 343115
Step 422: 343115 + 815 = 343930
Step 423: 343930 + 815 = 344745
Step 424: 344745 + 815 = 345560
Step 425: 345560 + 815 = 346375
Step 426: 346375 + 815 = 347190
Step 427: 347190 + 815 = 348005
Step 428: 348005 + 815 = 348820
Step 429: 348820 + 815 = 349635
Step 430: 349635 + 815 = 350450
Step 431: 350450 + 815 = 351265
Step 432: 351265 + 815 = 352080
Step 433: 352080 + 815 = 352895
Step 434: 352895 + 815 = 353710

So, 815*434 = 353710