Let's roll up our sleeves and solve this. We have 805 and we're going to multiply it by 438, essentially adding 805 to itself 438 times.
Step 1: 0 + 805 = 805
Step 2: 805 + 805 = 1610
Step 3: 1610 + 805 = 2415
Step 4: 2415 + 805 = 3220
Step 5: 3220 + 805 = 4025
Step 6: 4025 + 805 = 4830
Step 7: 4830 + 805 = 5635
Step 8: 5635 + 805 = 6440
Step 9: 6440 + 805 = 7245
Step 10: 7245 + 805 = 8050
Step 11: 8050 + 805 = 8855
Step 12: 8855 + 805 = 9660
Step 13: 9660 + 805 = 10465
Step 14: 10465 + 805 = 11270
Step 15: 11270 + 805 = 12075
Step 16: 12075 + 805 = 12880
Step 17: 12880 + 805 = 13685
Step 18: 13685 + 805 = 14490
Step 19: 14490 + 805 = 15295
Step 20: 15295 + 805 = 16100
Step 21: 16100 + 805 = 16905
Step 22: 16905 + 805 = 17710
Step 23: 17710 + 805 = 18515
Step 24: 18515 + 805 = 19320
Step 25: 19320 + 805 = 20125
Step 26: 20125 + 805 = 20930
Step 27: 20930 + 805 = 21735
Step 28: 21735 + 805 = 22540
Step 29: 22540 + 805 = 23345
Step 30: 23345 + 805 = 24150
Step 31: 24150 + 805 = 24955
Step 32: 24955 + 805 = 25760
Step 33: 25760 + 805 = 26565
Step 34: 26565 + 805 = 27370
Step 35: 27370 + 805 = 28175
Step 36: 28175 + 805 = 28980
Step 37: 28980 + 805 = 29785
Step 38: 29785 + 805 = 30590
Step 39: 30590 + 805 = 31395
Step 40: 31395 + 805 = 32200
Step 41: 32200 + 805 = 33005
Step 42: 33005 + 805 = 33810
Step 43: 33810 + 805 = 34615
Step 44: 34615 + 805 = 35420
Step 45: 35420 + 805 = 36225
Step 46: 36225 + 805 = 37030
Step 47: 37030 + 805 = 37835
Step 48: 37835 + 805 = 38640
Step 49: 38640 + 805 = 39445
Step 50: 39445 + 805 = 40250
Step 51: 40250 + 805 = 41055
Step 52: 41055 + 805 = 41860
Step 53: 41860 + 805 = 42665
Step 54: 42665 + 805 = 43470
Step 55: 43470 + 805 = 44275
Step 56: 44275 + 805 = 45080
Step 57: 45080 + 805 = 45885
Step 58: 45885 + 805 = 46690
Step 59: 46690 + 805 = 47495
Step 60: 47495 + 805 = 48300
Step 61: 48300 + 805 = 49105
Step 62: 49105 + 805 = 49910
Step 63: 49910 + 805 = 50715
Step 64: 50715 + 805 = 51520
Step 65: 51520 + 805 = 52325
Step 66: 52325 + 805 = 53130
Step 67: 53130 + 805 = 53935
Step 68: 53935 + 805 = 54740
Step 69: 54740 + 805 = 55545
Step 70: 55545 + 805 = 56350
Step 71: 56350 + 805 = 57155
Step 72: 57155 + 805 = 57960
Step 73: 57960 + 805 = 58765
Step 74: 58765 + 805 = 59570
Step 75: 59570 + 805 = 60375
Step 76: 60375 + 805 = 61180
Step 77: 61180 + 805 = 61985
Step 78: 61985 + 805 = 62790
Step 79: 62790 + 805 = 63595
Step 80: 63595 + 805 = 64400
Step 81: 64400 + 805 = 65205
Step 82: 65205 + 805 = 66010
Step 83: 66010 + 805 = 66815
Step 84: 66815 + 805 = 67620
Step 85: 67620 + 805 = 68425
Step 86: 68425 + 805 = 69230
Step 87: 69230 + 805 = 70035
Step 88: 70035 + 805 = 70840
Step 89: 70840 + 805 = 71645
Step 90: 71645 + 805 = 72450
Step 91: 72450 + 805 = 73255
Step 92: 73255 + 805 = 74060
Step 93: 74060 + 805 = 74865
Step 94: 74865 + 805 = 75670
Step 95: 75670 + 805 = 76475
Step 96: 76475 + 805 = 77280
Step 97: 77280 + 805 = 78085
Step 98: 78085 + 805 = 78890
Step 99: 78890 + 805 = 79695
Step 100: 79695 + 805 = 80500
Step 101: 80500 + 805 = 81305
Step 102: 81305 + 805 = 82110
Step 103: 82110 + 805 = 82915
Step 104: 82915 + 805 = 83720
Step 105: 83720 + 805 = 84525
Step 106: 84525 + 805 = 85330
Step 107: 85330 + 805 = 86135
Step 108: 86135 + 805 = 86940
Step 109: 86940 + 805 = 87745
Step 110: 87745 + 805 = 88550
Step 111: 88550 + 805 = 89355
Step 112: 89355 + 805 = 90160
Step 113: 90160 + 805 = 90965
Step 114: 90965 + 805 = 91770
Step 115: 91770 + 805 = 92575
Step 116: 92575 + 805 = 93380
Step 117: 93380 + 805 = 94185
Step 118: 94185 + 805 = 94990
Step 119: 94990 + 805 = 95795
Step 120: 95795 + 805 = 96600
Step 121: 96600 + 805 = 97405
Step 122: 97405 + 805 = 98210
Step 123: 98210 + 805 = 99015
Step 124: 99015 + 805 = 99820
Step 125: 99820 + 805 = 100625
Step 126: 100625 + 805 = 101430
Step 127: 101430 + 805 = 102235
Step 128: 102235 + 805 = 103040
Step 129: 103040 + 805 = 103845
Step 130: 103845 + 805 = 104650
Step 131: 104650 + 805 = 105455
Step 132: 105455 + 805 = 106260
Step 133: 106260 + 805 = 107065
Step 134: 107065 + 805 = 107870
Step 135: 107870 + 805 = 108675
Step 136: 108675 + 805 = 109480
Step 137: 109480 + 805 = 110285
Step 138: 110285 + 805 = 111090
Step 139: 111090 + 805 = 111895
Step 140: 111895 + 805 = 112700
Step 141: 112700 + 805 = 113505
Step 142: 113505 + 805 = 114310
Step 143: 114310 + 805 = 115115
Step 144: 115115 + 805 = 115920
Step 145: 115920 + 805 = 116725
Step 146: 116725 + 805 = 117530
Step 147: 117530 + 805 = 118335
Step 148: 118335 + 805 = 119140
Step 149: 119140 + 805 = 119945
Step 150: 119945 + 805 = 120750
Step 151: 120750 + 805 = 121555
Step 152: 121555 + 805 = 122360
Step 153: 122360 + 805 = 123165
Step 154: 123165 + 805 = 123970
Step 155: 123970 + 805 = 124775
Step 156: 124775 + 805 = 125580
Step 157: 125580 + 805 = 126385
Step 158: 126385 + 805 = 127190
Step 159: 127190 + 805 = 127995
Step 160: 127995 + 805 = 128800
Step 161: 128800 + 805 = 129605
Step 162: 129605 + 805 = 130410
Step 163: 130410 + 805 = 131215
Step 164: 131215 + 805 = 132020
Step 165: 132020 + 805 = 132825
Step 166: 132825 + 805 = 133630
Step 167: 133630 + 805 = 134435
Step 168: 134435 + 805 = 135240
Step 169: 135240 + 805 = 136045
Step 170: 136045 + 805 = 136850
Step 171: 136850 + 805 = 137655
Step 172: 137655 + 805 = 138460
Step 173: 138460 + 805 = 139265
Step 174: 139265 + 805 = 140070
Step 175: 140070 + 805 = 140875
Step 176: 140875 + 805 = 141680
Step 177: 141680 + 805 = 142485
Step 178: 142485 + 805 = 143290
Step 179: 143290 + 805 = 144095
Step 180: 144095 + 805 = 144900
Step 181: 144900 + 805 = 145705
Step 182: 145705 + 805 = 146510
Step 183: 146510 + 805 = 147315
Step 184: 147315 + 805 = 148120
Step 185: 148120 + 805 = 148925
Step 186: 148925 + 805 = 149730
Step 187: 149730 + 805 = 150535
Step 188: 150535 + 805 = 151340
Step 189: 151340 + 805 = 152145
Step 190: 152145 + 805 = 152950
Step 191: 152950 + 805 = 153755
Step 192: 153755 + 805 = 154560
Step 193: 154560 + 805 = 155365
Step 194: 155365 + 805 = 156170
Step 195: 156170 + 805 = 156975
Step 196: 156975 + 805 = 157780
Step 197: 157780 + 805 = 158585
Step 198: 158585 + 805 = 159390
Step 199: 159390 + 805 = 160195
Step 200: 160195 + 805 = 161000
Step 201: 161000 + 805 = 161805
Step 202: 161805 + 805 = 162610
Step 203: 162610 + 805 = 163415
Step 204: 163415 + 805 = 164220
Step 205: 164220 + 805 = 165025
Step 206: 165025 + 805 = 165830
Step 207: 165830 + 805 = 166635
Step 208: 166635 + 805 = 167440
Step 209: 167440 + 805 = 168245
Step 210: 168245 + 805 = 169050
Step 211: 169050 + 805 = 169855
Step 212: 169855 + 805 = 170660
Step 213: 170660 + 805 = 171465
Step 214: 171465 + 805 = 172270
Step 215: 172270 + 805 = 173075
Step 216: 173075 + 805 = 173880
Step 217: 173880 + 805 = 174685
Step 218: 174685 + 805 = 175490
Step 219: 175490 + 805 = 176295
Step 220: 176295 + 805 = 177100
Step 221: 177100 + 805 = 177905
Step 222: 177905 + 805 = 178710
Step 223: 178710 + 805 = 179515
Step 224: 179515 + 805 = 180320
Step 225: 180320 + 805 = 181125
Step 226: 181125 + 805 = 181930
Step 227: 181930 + 805 = 182735
Step 228: 182735 + 805 = 183540
Step 229: 183540 + 805 = 184345
Step 230: 184345 + 805 = 185150
Step 231: 185150 + 805 = 185955
Step 232: 185955 + 805 = 186760
Step 233: 186760 + 805 = 187565
Step 234: 187565 + 805 = 188370
Step 235: 188370 + 805 = 189175
Step 236: 189175 + 805 = 189980
Step 237: 189980 + 805 = 190785
Step 238: 190785 + 805 = 191590
Step 239: 191590 + 805 = 192395
Step 240: 192395 + 805 = 193200
Step 241: 193200 + 805 = 194005
Step 242: 194005 + 805 = 194810
Step 243: 194810 + 805 = 195615
Step 244: 195615 + 805 = 196420
Step 245: 196420 + 805 = 197225
Step 246: 197225 + 805 = 198030
Step 247: 198030 + 805 = 198835
Step 248: 198835 + 805 = 199640
Step 249: 199640 + 805 = 200445
Step 250: 200445 + 805 = 201250
Step 251: 201250 + 805 = 202055
Step 252: 202055 + 805 = 202860
Step 253: 202860 + 805 = 203665
Step 254: 203665 + 805 = 204470
Step 255: 204470 + 805 = 205275
Step 256: 205275 + 805 = 206080
Step 257: 206080 + 805 = 206885
Step 258: 206885 + 805 = 207690
Step 259: 207690 + 805 = 208495
Step 260: 208495 + 805 = 209300
Step 261: 209300 + 805 = 210105
Step 262: 210105 + 805 = 210910
Step 263: 210910 + 805 = 211715
Step 264: 211715 + 805 = 212520
Step 265: 212520 + 805 = 213325
Step 266: 213325 + 805 = 214130
Step 267: 214130 + 805 = 214935
Step 268: 214935 + 805 = 215740
Step 269: 215740 + 805 = 216545
Step 270: 216545 + 805 = 217350
Step 271: 217350 + 805 = 218155
Step 272: 218155 + 805 = 218960
Step 273: 218960 + 805 = 219765
Step 274: 219765 + 805 = 220570
Step 275: 220570 + 805 = 221375
Step 276: 221375 + 805 = 222180
Step 277: 222180 + 805 = 222985
Step 278: 222985 + 805 = 223790
Step 279: 223790 + 805 = 224595
Step 280: 224595 + 805 = 225400
Step 281: 225400 + 805 = 226205
Step 282: 226205 + 805 = 227010
Step 283: 227010 + 805 = 227815
Step 284: 227815 + 805 = 228620
Step 285: 228620 + 805 = 229425
Step 286: 229425 + 805 = 230230
Step 287: 230230 + 805 = 231035
Step 288: 231035 + 805 = 231840
Step 289: 231840 + 805 = 232645
Step 290: 232645 + 805 = 233450
Step 291: 233450 + 805 = 234255
Step 292: 234255 + 805 = 235060
Step 293: 235060 + 805 = 235865
Step 294: 235865 + 805 = 236670
Step 295: 236670 + 805 = 237475
Step 296: 237475 + 805 = 238280
Step 297: 238280 + 805 = 239085
Step 298: 239085 + 805 = 239890
Step 299: 239890 + 805 = 240695
Step 300: 240695 + 805 = 241500
Step 301: 241500 + 805 = 242305
Step 302: 242305 + 805 = 243110
Step 303: 243110 + 805 = 243915
Step 304: 243915 + 805 = 244720
Step 305: 244720 + 805 = 245525
Step 306: 245525 + 805 = 246330
Step 307: 246330 + 805 = 247135
Step 308: 247135 + 805 = 247940
Step 309: 247940 + 805 = 248745
Step 310: 248745 + 805 = 249550
Step 311: 249550 + 805 = 250355
Step 312: 250355 + 805 = 251160
Step 313: 251160 + 805 = 251965
Step 314: 251965 + 805 = 252770
Step 315: 252770 + 805 = 253575
Step 316: 253575 + 805 = 254380
Step 317: 254380 + 805 = 255185
Step 318: 255185 + 805 = 255990
Step 319: 255990 + 805 = 256795
Step 320: 256795 + 805 = 257600
Step 321: 257600 + 805 = 258405
Step 322: 258405 + 805 = 259210
Step 323: 259210 + 805 = 260015
Step 324: 260015 + 805 = 260820
Step 325: 260820 + 805 = 261625
Step 326: 261625 + 805 = 262430
Step 327: 262430 + 805 = 263235
Step 328: 263235 + 805 = 264040
Step 329: 264040 + 805 = 264845
Step 330: 264845 + 805 = 265650
Step 331: 265650 + 805 = 266455
Step 332: 266455 + 805 = 267260
Step 333: 267260 + 805 = 268065
Step 334: 268065 + 805 = 268870
Step 335: 268870 + 805 = 269675
Step 336: 269675 + 805 = 270480
Step 337: 270480 + 805 = 271285
Step 338: 271285 + 805 = 272090
Step 339: 272090 + 805 = 272895
Step 340: 272895 + 805 = 273700
Step 341: 273700 + 805 = 274505
Step 342: 274505 + 805 = 275310
Step 343: 275310 + 805 = 276115
Step 344: 276115 + 805 = 276920
Step 345: 276920 + 805 = 277725
Step 346: 277725 + 805 = 278530
Step 347: 278530 + 805 = 279335
Step 348: 279335 + 805 = 280140
Step 349: 280140 + 805 = 280945
Step 350: 280945 + 805 = 281750
Step 351: 281750 + 805 = 282555
Step 352: 282555 + 805 = 283360
Step 353: 283360 + 805 = 284165
Step 354: 284165 + 805 = 284970
Step 355: 284970 + 805 = 285775
Step 356: 285775 + 805 = 286580
Step 357: 286580 + 805 = 287385
Step 358: 287385 + 805 = 288190
Step 359: 288190 + 805 = 288995
Step 360: 288995 + 805 = 289800
Step 361: 289800 + 805 = 290605
Step 362: 290605 + 805 = 291410
Step 363: 291410 + 805 = 292215
Step 364: 292215 + 805 = 293020
Step 365: 293020 + 805 = 293825
Step 366: 293825 + 805 = 294630
Step 367: 294630 + 805 = 295435
Step 368: 295435 + 805 = 296240
Step 369: 296240 + 805 = 297045
Step 370: 297045 + 805 = 297850
Step 371: 297850 + 805 = 298655
Step 372: 298655 + 805 = 299460
Step 373: 299460 + 805 = 300265
Step 374: 300265 + 805 = 301070
Step 375: 301070 + 805 = 301875
Step 376: 301875 + 805 = 302680
Step 377: 302680 + 805 = 303485
Step 378: 303485 + 805 = 304290
Step 379: 304290 + 805 = 305095
Step 380: 305095 + 805 = 305900
Step 381: 305900 + 805 = 306705
Step 382: 306705 + 805 = 307510
Step 383: 307510 + 805 = 308315
Step 384: 308315 + 805 = 309120
Step 385: 309120 + 805 = 309925
Step 386: 309925 + 805 = 310730
Step 387: 310730 + 805 = 311535
Step 388: 311535 + 805 = 312340
Step 389: 312340 + 805 = 313145
Step 390: 313145 + 805 = 313950
Step 391: 313950 + 805 = 314755
Step 392: 314755 + 805 = 315560
Step 393: 315560 + 805 = 316365
Step 394: 316365 + 805 = 317170
Step 395: 317170 + 805 = 317975
Step 396: 317975 + 805 = 318780
Step 397: 318780 + 805 = 319585
Step 398: 319585 + 805 = 320390
Step 399: 320390 + 805 = 321195
Step 400: 321195 + 805 = 322000
Step 401: 322000 + 805 = 322805
Step 402: 322805 + 805 = 323610
Step 403: 323610 + 805 = 324415
Step 404: 324415 + 805 = 325220
Step 405: 325220 + 805 = 326025
Step 406: 326025 + 805 = 326830
Step 407: 326830 + 805 = 327635
Step 408: 327635 + 805 = 328440
Step 409: 328440 + 805 = 329245
Step 410: 329245 + 805 = 330050
Step 411: 330050 + 805 = 330855
Step 412: 330855 + 805 = 331660
Step 413: 331660 + 805 = 332465
Step 414: 332465 + 805 = 333270
Step 415: 333270 + 805 = 334075
Step 416: 334075 + 805 = 334880
Step 417: 334880 + 805 = 335685
Step 418: 335685 + 805 = 336490
Step 419: 336490 + 805 = 337295
Step 420: 337295 + 805 = 338100
Step 421: 338100 + 805 = 338905
Step 422: 338905 + 805 = 339710
Step 423: 339710 + 805 = 340515
Step 424: 340515 + 805 = 341320
Step 425: 341320 + 805 = 342125
Step 426: 342125 + 805 = 342930
Step 427: 342930 + 805 = 343735
Step 428: 343735 + 805 = 344540
Step 429: 344540 + 805 = 345345
Step 430: 345345 + 805 = 346150
Step 431: 346150 + 805 = 346955
Step 432: 346955 + 805 = 347760
Step 433: 347760 + 805 = 348565
Step 434: 348565 + 805 = 349370
Step 435: 349370 + 805 = 350175
Step 436: 350175 + 805 = 350980
Step 437: 350980 + 805 = 351785
Step 438: 351785 + 805 = 352590

So, 805*438 = 352590