Alright, let's solve this math problem step by step. First, we have the number 809. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 105. So, we're going to take the number 809 and add it to itself 105 times.
Step 1: 0 + 809 = 809
Step 2: 809 + 809 = 1618
Step 3: 1618 + 809 = 2427
Step 4: 2427 + 809 = 3236
Step 5: 3236 + 809 = 4045
Step 6: 4045 + 809 = 4854
Step 7: 4854 + 809 = 5663
Step 8: 5663 + 809 = 6472
Step 9: 6472 + 809 = 7281
Step 10: 7281 + 809 = 8090
Step 11: 8090 + 809 = 8899
Step 12: 8899 + 809 = 9708
Step 13: 9708 + 809 = 10517
Step 14: 10517 + 809 = 11326
Step 15: 11326 + 809 = 12135
Step 16: 12135 + 809 = 12944
Step 17: 12944 + 809 = 13753
Step 18: 13753 + 809 = 14562
Step 19: 14562 + 809 = 15371
Step 20: 15371 + 809 = 16180
Step 21: 16180 + 809 = 16989
Step 22: 16989 + 809 = 17798
Step 23: 17798 + 809 = 18607
Step 24: 18607 + 809 = 19416
Step 25: 19416 + 809 = 20225
Step 26: 20225 + 809 = 21034
Step 27: 21034 + 809 = 21843
Step 28: 21843 + 809 = 22652
Step 29: 22652 + 809 = 23461
Step 30: 23461 + 809 = 24270
Step 31: 24270 + 809 = 25079
Step 32: 25079 + 809 = 25888
Step 33: 25888 + 809 = 26697
Step 34: 26697 + 809 = 27506
Step 35: 27506 + 809 = 28315
Step 36: 28315 + 809 = 29124
Step 37: 29124 + 809 = 29933
Step 38: 29933 + 809 = 30742
Step 39: 30742 + 809 = 31551
Step 40: 31551 + 809 = 32360
Step 41: 32360 + 809 = 33169
Step 42: 33169 + 809 = 33978
Step 43: 33978 + 809 = 34787
Step 44: 34787 + 809 = 35596
Step 45: 35596 + 809 = 36405
Step 46: 36405 + 809 = 37214
Step 47: 37214 + 809 = 38023
Step 48: 38023 + 809 = 38832
Step 49: 38832 + 809 = 39641
Step 50: 39641 + 809 = 40450
Step 51: 40450 + 809 = 41259
Step 52: 41259 + 809 = 42068
Step 53: 42068 + 809 = 42877
Step 54: 42877 + 809 = 43686
Step 55: 43686 + 809 = 44495
Step 56: 44495 + 809 = 45304
Step 57: 45304 + 809 = 46113
Step 58: 46113 + 809 = 46922
Step 59: 46922 + 809 = 47731
Step 60: 47731 + 809 = 48540
Step 61: 48540 + 809 = 49349
Step 62: 49349 + 809 = 50158
Step 63: 50158 + 809 = 50967
Step 64: 50967 + 809 = 51776
Step 65: 51776 + 809 = 52585
Step 66: 52585 + 809 = 53394
Step 67: 53394 + 809 = 54203
Step 68: 54203 + 809 = 55012
Step 69: 55012 + 809 = 55821
Step 70: 55821 + 809 = 56630
Step 71: 56630 + 809 = 57439
Step 72: 57439 + 809 = 58248
Step 73: 58248 + 809 = 59057
Step 74: 59057 + 809 = 59866
Step 75: 59866 + 809 = 60675
Step 76: 60675 + 809 = 61484
Step 77: 61484 + 809 = 62293
Step 78: 62293 + 809 = 63102
Step 79: 63102 + 809 = 63911
Step 80: 63911 + 809 = 64720
Step 81: 64720 + 809 = 65529
Step 82: 65529 + 809 = 66338
Step 83: 66338 + 809 = 67147
Step 84: 67147 + 809 = 67956
Step 85: 67956 + 809 = 68765
Step 86: 68765 + 809 = 69574
Step 87: 69574 + 809 = 70383
Step 88: 70383 + 809 = 71192
Step 89: 71192 + 809 = 72001
Step 90: 72001 + 809 = 72810
Step 91: 72810 + 809 = 73619
Step 92: 73619 + 809 = 74428
Step 93: 74428 + 809 = 75237
Step 94: 75237 + 809 = 76046
Step 95: 76046 + 809 = 76855
Step 96: 76855 + 809 = 77664
Step 97: 77664 + 809 = 78473
Step 98: 78473 + 809 = 79282
Step 99: 79282 + 809 = 80091
Step 100: 80091 + 809 = 80900
Step 101: 80900 + 809 = 81709
Step 102: 81709 + 809 = 82518
Step 103: 82518 + 809 = 83327
Step 104: 83327 + 809 = 84136
Step 105: 84136 + 809 = 84945

So, 809*105 = 84945