OK, let's crack this. We're given 808 and our task is to multiply it by 425. Essentially, we'll be adding 808 to itself 425 times.
Step 1: 0 + 808 = 808
Step 2: 808 + 808 = 1616
Step 3: 1616 + 808 = 2424
Step 4: 2424 + 808 = 3232
Step 5: 3232 + 808 = 4040
Step 6: 4040 + 808 = 4848
Step 7: 4848 + 808 = 5656
Step 8: 5656 + 808 = 6464
Step 9: 6464 + 808 = 7272
Step 10: 7272 + 808 = 8080
Step 11: 8080 + 808 = 8888
Step 12: 8888 + 808 = 9696
Step 13: 9696 + 808 = 10504
Step 14: 10504 + 808 = 11312
Step 15: 11312 + 808 = 12120
Step 16: 12120 + 808 = 12928
Step 17: 12928 + 808 = 13736
Step 18: 13736 + 808 = 14544
Step 19: 14544 + 808 = 15352
Step 20: 15352 + 808 = 16160
Step 21: 16160 + 808 = 16968
Step 22: 16968 + 808 = 17776
Step 23: 17776 + 808 = 18584
Step 24: 18584 + 808 = 19392
Step 25: 19392 + 808 = 20200
Step 26: 20200 + 808 = 21008
Step 27: 21008 + 808 = 21816
Step 28: 21816 + 808 = 22624
Step 29: 22624 + 808 = 23432
Step 30: 23432 + 808 = 24240
Step 31: 24240 + 808 = 25048
Step 32: 25048 + 808 = 25856
Step 33: 25856 + 808 = 26664
Step 34: 26664 + 808 = 27472
Step 35: 27472 + 808 = 28280
Step 36: 28280 + 808 = 29088
Step 37: 29088 + 808 = 29896
Step 38: 29896 + 808 = 30704
Step 39: 30704 + 808 = 31512
Step 40: 31512 + 808 = 32320
Step 41: 32320 + 808 = 33128
Step 42: 33128 + 808 = 33936
Step 43: 33936 + 808 = 34744
Step 44: 34744 + 808 = 35552
Step 45: 35552 + 808 = 36360
Step 46: 36360 + 808 = 37168
Step 47: 37168 + 808 = 37976
Step 48: 37976 + 808 = 38784
Step 49: 38784 + 808 = 39592
Step 50: 39592 + 808 = 40400
Step 51: 40400 + 808 = 41208
Step 52: 41208 + 808 = 42016
Step 53: 42016 + 808 = 42824
Step 54: 42824 + 808 = 43632
Step 55: 43632 + 808 = 44440
Step 56: 44440 + 808 = 45248
Step 57: 45248 + 808 = 46056
Step 58: 46056 + 808 = 46864
Step 59: 46864 + 808 = 47672
Step 60: 47672 + 808 = 48480
Step 61: 48480 + 808 = 49288
Step 62: 49288 + 808 = 50096
Step 63: 50096 + 808 = 50904
Step 64: 50904 + 808 = 51712
Step 65: 51712 + 808 = 52520
Step 66: 52520 + 808 = 53328
Step 67: 53328 + 808 = 54136
Step 68: 54136 + 808 = 54944
Step 69: 54944 + 808 = 55752
Step 70: 55752 + 808 = 56560
Step 71: 56560 + 808 = 57368
Step 72: 57368 + 808 = 58176
Step 73: 58176 + 808 = 58984
Step 74: 58984 + 808 = 59792
Step 75: 59792 + 808 = 60600
Step 76: 60600 + 808 = 61408
Step 77: 61408 + 808 = 62216
Step 78: 62216 + 808 = 63024
Step 79: 63024 + 808 = 63832
Step 80: 63832 + 808 = 64640
Step 81: 64640 + 808 = 65448
Step 82: 65448 + 808 = 66256
Step 83: 66256 + 808 = 67064
Step 84: 67064 + 808 = 67872
Step 85: 67872 + 808 = 68680
Step 86: 68680 + 808 = 69488
Step 87: 69488 + 808 = 70296
Step 88: 70296 + 808 = 71104
Step 89: 71104 + 808 = 71912
Step 90: 71912 + 808 = 72720
Step 91: 72720 + 808 = 73528
Step 92: 73528 + 808 = 74336
Step 93: 74336 + 808 = 75144
Step 94: 75144 + 808 = 75952
Step 95: 75952 + 808 = 76760
Step 96: 76760 + 808 = 77568
Step 97: 77568 + 808 = 78376
Step 98: 78376 + 808 = 79184
Step 99: 79184 + 808 = 79992
Step 100: 79992 + 808 = 80800
Step 101: 80800 + 808 = 81608
Step 102: 81608 + 808 = 82416
Step 103: 82416 + 808 = 83224
Step 104: 83224 + 808 = 84032
Step 105: 84032 + 808 = 84840
Step 106: 84840 + 808 = 85648
Step 107: 85648 + 808 = 86456
Step 108: 86456 + 808 = 87264
Step 109: 87264 + 808 = 88072
Step 110: 88072 + 808 = 88880
Step 111: 88880 + 808 = 89688
Step 112: 89688 + 808 = 90496
Step 113: 90496 + 808 = 91304
Step 114: 91304 + 808 = 92112
Step 115: 92112 + 808 = 92920
Step 116: 92920 + 808 = 93728
Step 117: 93728 + 808 = 94536
Step 118: 94536 + 808 = 95344
Step 119: 95344 + 808 = 96152
Step 120: 96152 + 808 = 96960
Step 121: 96960 + 808 = 97768
Step 122: 97768 + 808 = 98576
Step 123: 98576 + 808 = 99384
Step 124: 99384 + 808 = 100192
Step 125: 100192 + 808 = 101000
Step 126: 101000 + 808 = 101808
Step 127: 101808 + 808 = 102616
Step 128: 102616 + 808 = 103424
Step 129: 103424 + 808 = 104232
Step 130: 104232 + 808 = 105040
Step 131: 105040 + 808 = 105848
Step 132: 105848 + 808 = 106656
Step 133: 106656 + 808 = 107464
Step 134: 107464 + 808 = 108272
Step 135: 108272 + 808 = 109080
Step 136: 109080 + 808 = 109888
Step 137: 109888 + 808 = 110696
Step 138: 110696 + 808 = 111504
Step 139: 111504 + 808 = 112312
Step 140: 112312 + 808 = 113120
Step 141: 113120 + 808 = 113928
Step 142: 113928 + 808 = 114736
Step 143: 114736 + 808 = 115544
Step 144: 115544 + 808 = 116352
Step 145: 116352 + 808 = 117160
Step 146: 117160 + 808 = 117968
Step 147: 117968 + 808 = 118776
Step 148: 118776 + 808 = 119584
Step 149: 119584 + 808 = 120392
Step 150: 120392 + 808 = 121200
Step 151: 121200 + 808 = 122008
Step 152: 122008 + 808 = 122816
Step 153: 122816 + 808 = 123624
Step 154: 123624 + 808 = 124432
Step 155: 124432 + 808 = 125240
Step 156: 125240 + 808 = 126048
Step 157: 126048 + 808 = 126856
Step 158: 126856 + 808 = 127664
Step 159: 127664 + 808 = 128472
Step 160: 128472 + 808 = 129280
Step 161: 129280 + 808 = 130088
Step 162: 130088 + 808 = 130896
Step 163: 130896 + 808 = 131704
Step 164: 131704 + 808 = 132512
Step 165: 132512 + 808 = 133320
Step 166: 133320 + 808 = 134128
Step 167: 134128 + 808 = 134936
Step 168: 134936 + 808 = 135744
Step 169: 135744 + 808 = 136552
Step 170: 136552 + 808 = 137360
Step 171: 137360 + 808 = 138168
Step 172: 138168 + 808 = 138976
Step 173: 138976 + 808 = 139784
Step 174: 139784 + 808 = 140592
Step 175: 140592 + 808 = 141400
Step 176: 141400 + 808 = 142208
Step 177: 142208 + 808 = 143016
Step 178: 143016 + 808 = 143824
Step 179: 143824 + 808 = 144632
Step 180: 144632 + 808 = 145440
Step 181: 145440 + 808 = 146248
Step 182: 146248 + 808 = 147056
Step 183: 147056 + 808 = 147864
Step 184: 147864 + 808 = 148672
Step 185: 148672 + 808 = 149480
Step 186: 149480 + 808 = 150288
Step 187: 150288 + 808 = 151096
Step 188: 151096 + 808 = 151904
Step 189: 151904 + 808 = 152712
Step 190: 152712 + 808 = 153520
Step 191: 153520 + 808 = 154328
Step 192: 154328 + 808 = 155136
Step 193: 155136 + 808 = 155944
Step 194: 155944 + 808 = 156752
Step 195: 156752 + 808 = 157560
Step 196: 157560 + 808 = 158368
Step 197: 158368 + 808 = 159176
Step 198: 159176 + 808 = 159984
Step 199: 159984 + 808 = 160792
Step 200: 160792 + 808 = 161600
Step 201: 161600 + 808 = 162408
Step 202: 162408 + 808 = 163216
Step 203: 163216 + 808 = 164024
Step 204: 164024 + 808 = 164832
Step 205: 164832 + 808 = 165640
Step 206: 165640 + 808 = 166448
Step 207: 166448 + 808 = 167256
Step 208: 167256 + 808 = 168064
Step 209: 168064 + 808 = 168872
Step 210: 168872 + 808 = 169680
Step 211: 169680 + 808 = 170488
Step 212: 170488 + 808 = 171296
Step 213: 171296 + 808 = 172104
Step 214: 172104 + 808 = 172912
Step 215: 172912 + 808 = 173720
Step 216: 173720 + 808 = 174528
Step 217: 174528 + 808 = 175336
Step 218: 175336 + 808 = 176144
Step 219: 176144 + 808 = 176952
Step 220: 176952 + 808 = 177760
Step 221: 177760 + 808 = 178568
Step 222: 178568 + 808 = 179376
Step 223: 179376 + 808 = 180184
Step 224: 180184 + 808 = 180992
Step 225: 180992 + 808 = 181800
Step 226: 181800 + 808 = 182608
Step 227: 182608 + 808 = 183416
Step 228: 183416 + 808 = 184224
Step 229: 184224 + 808 = 185032
Step 230: 185032 + 808 = 185840
Step 231: 185840 + 808 = 186648
Step 232: 186648 + 808 = 187456
Step 233: 187456 + 808 = 188264
Step 234: 188264 + 808 = 189072
Step 235: 189072 + 808 = 189880
Step 236: 189880 + 808 = 190688
Step 237: 190688 + 808 = 191496
Step 238: 191496 + 808 = 192304
Step 239: 192304 + 808 = 193112
Step 240: 193112 + 808 = 193920
Step 241: 193920 + 808 = 194728
Step 242: 194728 + 808 = 195536
Step 243: 195536 + 808 = 196344
Step 244: 196344 + 808 = 197152
Step 245: 197152 + 808 = 197960
Step 246: 197960 + 808 = 198768
Step 247: 198768 + 808 = 199576
Step 248: 199576 + 808 = 200384
Step 249: 200384 + 808 = 201192
Step 250: 201192 + 808 = 202000
Step 251: 202000 + 808 = 202808
Step 252: 202808 + 808 = 203616
Step 253: 203616 + 808 = 204424
Step 254: 204424 + 808 = 205232
Step 255: 205232 + 808 = 206040
Step 256: 206040 + 808 = 206848
Step 257: 206848 + 808 = 207656
Step 258: 207656 + 808 = 208464
Step 259: 208464 + 808 = 209272
Step 260: 209272 + 808 = 210080
Step 261: 210080 + 808 = 210888
Step 262: 210888 + 808 = 211696
Step 263: 211696 + 808 = 212504
Step 264: 212504 + 808 = 213312
Step 265: 213312 + 808 = 214120
Step 266: 214120 + 808 = 214928
Step 267: 214928 + 808 = 215736
Step 268: 215736 + 808 = 216544
Step 269: 216544 + 808 = 217352
Step 270: 217352 + 808 = 218160
Step 271: 218160 + 808 = 218968
Step 272: 218968 + 808 = 219776
Step 273: 219776 + 808 = 220584
Step 274: 220584 + 808 = 221392
Step 275: 221392 + 808 = 222200
Step 276: 222200 + 808 = 223008
Step 277: 223008 + 808 = 223816
Step 278: 223816 + 808 = 224624
Step 279: 224624 + 808 = 225432
Step 280: 225432 + 808 = 226240
Step 281: 226240 + 808 = 227048
Step 282: 227048 + 808 = 227856
Step 283: 227856 + 808 = 228664
Step 284: 228664 + 808 = 229472
Step 285: 229472 + 808 = 230280
Step 286: 230280 + 808 = 231088
Step 287: 231088 + 808 = 231896
Step 288: 231896 + 808 = 232704
Step 289: 232704 + 808 = 233512
Step 290: 233512 + 808 = 234320
Step 291: 234320 + 808 = 235128
Step 292: 235128 + 808 = 235936
Step 293: 235936 + 808 = 236744
Step 294: 236744 + 808 = 237552
Step 295: 237552 + 808 = 238360
Step 296: 238360 + 808 = 239168
Step 297: 239168 + 808 = 239976
Step 298: 239976 + 808 = 240784
Step 299: 240784 + 808 = 241592
Step 300: 241592 + 808 = 242400
Step 301: 242400 + 808 = 243208
Step 302: 243208 + 808 = 244016
Step 303: 244016 + 808 = 244824
Step 304: 244824 + 808 = 245632
Step 305: 245632 + 808 = 246440
Step 306: 246440 + 808 = 247248
Step 307: 247248 + 808 = 248056
Step 308: 248056 + 808 = 248864
Step 309: 248864 + 808 = 249672
Step 310: 249672 + 808 = 250480
Step 311: 250480 + 808 = 251288
Step 312: 251288 + 808 = 252096
Step 313: 252096 + 808 = 252904
Step 314: 252904 + 808 = 253712
Step 315: 253712 + 808 = 254520
Step 316: 254520 + 808 = 255328
Step 317: 255328 + 808 = 256136
Step 318: 256136 + 808 = 256944
Step 319: 256944 + 808 = 257752
Step 320: 257752 + 808 = 258560
Step 321: 258560 + 808 = 259368
Step 322: 259368 + 808 = 260176
Step 323: 260176 + 808 = 260984
Step 324: 260984 + 808 = 261792
Step 325: 261792 + 808 = 262600
Step 326: 262600 + 808 = 263408
Step 327: 263408 + 808 = 264216
Step 328: 264216 + 808 = 265024
Step 329: 265024 + 808 = 265832
Step 330: 265832 + 808 = 266640
Step 331: 266640 + 808 = 267448
Step 332: 267448 + 808 = 268256
Step 333: 268256 + 808 = 269064
Step 334: 269064 + 808 = 269872
Step 335: 269872 + 808 = 270680
Step 336: 270680 + 808 = 271488
Step 337: 271488 + 808 = 272296
Step 338: 272296 + 808 = 273104
Step 339: 273104 + 808 = 273912
Step 340: 273912 + 808 = 274720
Step 341: 274720 + 808 = 275528
Step 342: 275528 + 808 = 276336
Step 343: 276336 + 808 = 277144
Step 344: 277144 + 808 = 277952
Step 345: 277952 + 808 = 278760
Step 346: 278760 + 808 = 279568
Step 347: 279568 + 808 = 280376
Step 348: 280376 + 808 = 281184
Step 349: 281184 + 808 = 281992
Step 350: 281992 + 808 = 282800
Step 351: 282800 + 808 = 283608
Step 352: 283608 + 808 = 284416
Step 353: 284416 + 808 = 285224
Step 354: 285224 + 808 = 286032
Step 355: 286032 + 808 = 286840
Step 356: 286840 + 808 = 287648
Step 357: 287648 + 808 = 288456
Step 358: 288456 + 808 = 289264
Step 359: 289264 + 808 = 290072
Step 360: 290072 + 808 = 290880
Step 361: 290880 + 808 = 291688
Step 362: 291688 + 808 = 292496
Step 363: 292496 + 808 = 293304
Step 364: 293304 + 808 = 294112
Step 365: 294112 + 808 = 294920
Step 366: 294920 + 808 = 295728
Step 367: 295728 + 808 = 296536
Step 368: 296536 + 808 = 297344
Step 369: 297344 + 808 = 298152
Step 370: 298152 + 808 = 298960
Step 371: 298960 + 808 = 299768
Step 372: 299768 + 808 = 300576
Step 373: 300576 + 808 = 301384
Step 374: 301384 + 808 = 302192
Step 375: 302192 + 808 = 303000
Step 376: 303000 + 808 = 303808
Step 377: 303808 + 808 = 304616
Step 378: 304616 + 808 = 305424
Step 379: 305424 + 808 = 306232
Step 380: 306232 + 808 = 307040
Step 381: 307040 + 808 = 307848
Step 382: 307848 + 808 = 308656
Step 383: 308656 + 808 = 309464
Step 384: 309464 + 808 = 310272
Step 385: 310272 + 808 = 311080
Step 386: 311080 + 808 = 311888
Step 387: 311888 + 808 = 312696
Step 388: 312696 + 808 = 313504
Step 389: 313504 + 808 = 314312
Step 390: 314312 + 808 = 315120
Step 391: 315120 + 808 = 315928
Step 392: 315928 + 808 = 316736
Step 393: 316736 + 808 = 317544
Step 394: 317544 + 808 = 318352
Step 395: 318352 + 808 = 319160
Step 396: 319160 + 808 = 319968
Step 397: 319968 + 808 = 320776
Step 398: 320776 + 808 = 321584
Step 399: 321584 + 808 = 322392
Step 400: 322392 + 808 = 323200
Step 401: 323200 + 808 = 324008
Step 402: 324008 + 808 = 324816
Step 403: 324816 + 808 = 325624
Step 404: 325624 + 808 = 326432
Step 405: 326432 + 808 = 327240
Step 406: 327240 + 808 = 328048
Step 407: 328048 + 808 = 328856
Step 408: 328856 + 808 = 329664
Step 409: 329664 + 808 = 330472
Step 410: 330472 + 808 = 331280
Step 411: 331280 + 808 = 332088
Step 412: 332088 + 808 = 332896
Step 413: 332896 + 808 = 333704
Step 414: 333704 + 808 = 334512
Step 415: 334512 + 808 = 335320
Step 416: 335320 + 808 = 336128
Step 417: 336128 + 808 = 336936
Step 418: 336936 + 808 = 337744
Step 419: 337744 + 808 = 338552
Step 420: 338552 + 808 = 339360
Step 421: 339360 + 808 = 340168
Step 422: 340168 + 808 = 340976
Step 423: 340976 + 808 = 341784
Step 424: 341784 + 808 = 342592
Step 425: 342592 + 808 = 343400

So, 808*425 = 343400