OK, let's crack this. We're given 804 and our task is to multiply it by 97. Essentially, we'll be adding 804 to itself 97 times.
Step 1: 0 + 804 = 804
Step 2: 804 + 804 = 1608
Step 3: 1608 + 804 = 2412
Step 4: 2412 + 804 = 3216
Step 5: 3216 + 804 = 4020
Step 6: 4020 + 804 = 4824
Step 7: 4824 + 804 = 5628
Step 8: 5628 + 804 = 6432
Step 9: 6432 + 804 = 7236
Step 10: 7236 + 804 = 8040
Step 11: 8040 + 804 = 8844
Step 12: 8844 + 804 = 9648
Step 13: 9648 + 804 = 10452
Step 14: 10452 + 804 = 11256
Step 15: 11256 + 804 = 12060
Step 16: 12060 + 804 = 12864
Step 17: 12864 + 804 = 13668
Step 18: 13668 + 804 = 14472
Step 19: 14472 + 804 = 15276
Step 20: 15276 + 804 = 16080
Step 21: 16080 + 804 = 16884
Step 22: 16884 + 804 = 17688
Step 23: 17688 + 804 = 18492
Step 24: 18492 + 804 = 19296
Step 25: 19296 + 804 = 20100
Step 26: 20100 + 804 = 20904
Step 27: 20904 + 804 = 21708
Step 28: 21708 + 804 = 22512
Step 29: 22512 + 804 = 23316
Step 30: 23316 + 804 = 24120
Step 31: 24120 + 804 = 24924
Step 32: 24924 + 804 = 25728
Step 33: 25728 + 804 = 26532
Step 34: 26532 + 804 = 27336
Step 35: 27336 + 804 = 28140
Step 36: 28140 + 804 = 28944
Step 37: 28944 + 804 = 29748
Step 38: 29748 + 804 = 30552
Step 39: 30552 + 804 = 31356
Step 40: 31356 + 804 = 32160
Step 41: 32160 + 804 = 32964
Step 42: 32964 + 804 = 33768
Step 43: 33768 + 804 = 34572
Step 44: 34572 + 804 = 35376
Step 45: 35376 + 804 = 36180
Step 46: 36180 + 804 = 36984
Step 47: 36984 + 804 = 37788
Step 48: 37788 + 804 = 38592
Step 49: 38592 + 804 = 39396
Step 50: 39396 + 804 = 40200
Step 51: 40200 + 804 = 41004
Step 52: 41004 + 804 = 41808
Step 53: 41808 + 804 = 42612
Step 54: 42612 + 804 = 43416
Step 55: 43416 + 804 = 44220
Step 56: 44220 + 804 = 45024
Step 57: 45024 + 804 = 45828
Step 58: 45828 + 804 = 46632
Step 59: 46632 + 804 = 47436
Step 60: 47436 + 804 = 48240
Step 61: 48240 + 804 = 49044
Step 62: 49044 + 804 = 49848
Step 63: 49848 + 804 = 50652
Step 64: 50652 + 804 = 51456
Step 65: 51456 + 804 = 52260
Step 66: 52260 + 804 = 53064
Step 67: 53064 + 804 = 53868
Step 68: 53868 + 804 = 54672
Step 69: 54672 + 804 = 55476
Step 70: 55476 + 804 = 56280
Step 71: 56280 + 804 = 57084
Step 72: 57084 + 804 = 57888
Step 73: 57888 + 804 = 58692
Step 74: 58692 + 804 = 59496
Step 75: 59496 + 804 = 60300
Step 76: 60300 + 804 = 61104
Step 77: 61104 + 804 = 61908
Step 78: 61908 + 804 = 62712
Step 79: 62712 + 804 = 63516
Step 80: 63516 + 804 = 64320
Step 81: 64320 + 804 = 65124
Step 82: 65124 + 804 = 65928
Step 83: 65928 + 804 = 66732
Step 84: 66732 + 804 = 67536
Step 85: 67536 + 804 = 68340
Step 86: 68340 + 804 = 69144
Step 87: 69144 + 804 = 69948
Step 88: 69948 + 804 = 70752
Step 89: 70752 + 804 = 71556
Step 90: 71556 + 804 = 72360
Step 91: 72360 + 804 = 73164
Step 92: 73164 + 804 = 73968
Step 93: 73968 + 804 = 74772
Step 94: 74772 + 804 = 75576
Step 95: 75576 + 804 = 76380
Step 96: 76380 + 804 = 77184
Step 97: 77184 + 804 = 77988

So, 804*97 = 77988