Let's get this math done. We have 604 and we're going to multiply it by 107. This is the same as taking 604 and adding it to itself 107 times.
Step 1: 0 + 604 = 604
Step 2: 604 + 604 = 1208
Step 3: 1208 + 604 = 1812
Step 4: 1812 + 604 = 2416
Step 5: 2416 + 604 = 3020
Step 6: 3020 + 604 = 3624
Step 7: 3624 + 604 = 4228
Step 8: 4228 + 604 = 4832
Step 9: 4832 + 604 = 5436
Step 10: 5436 + 604 = 6040
Step 11: 6040 + 604 = 6644
Step 12: 6644 + 604 = 7248
Step 13: 7248 + 604 = 7852
Step 14: 7852 + 604 = 8456
Step 15: 8456 + 604 = 9060
Step 16: 9060 + 604 = 9664
Step 17: 9664 + 604 = 10268
Step 18: 10268 + 604 = 10872
Step 19: 10872 + 604 = 11476
Step 20: 11476 + 604 = 12080
Step 21: 12080 + 604 = 12684
Step 22: 12684 + 604 = 13288
Step 23: 13288 + 604 = 13892
Step 24: 13892 + 604 = 14496
Step 25: 14496 + 604 = 15100
Step 26: 15100 + 604 = 15704
Step 27: 15704 + 604 = 16308
Step 28: 16308 + 604 = 16912
Step 29: 16912 + 604 = 17516
Step 30: 17516 + 604 = 18120
Step 31: 18120 + 604 = 18724
Step 32: 18724 + 604 = 19328
Step 33: 19328 + 604 = 19932
Step 34: 19932 + 604 = 20536
Step 35: 20536 + 604 = 21140
Step 36: 21140 + 604 = 21744
Step 37: 21744 + 604 = 22348
Step 38: 22348 + 604 = 22952
Step 39: 22952 + 604 = 23556
Step 40: 23556 + 604 = 24160
Step 41: 24160 + 604 = 24764
Step 42: 24764 + 604 = 25368
Step 43: 25368 + 604 = 25972
Step 44: 25972 + 604 = 26576
Step 45: 26576 + 604 = 27180
Step 46: 27180 + 604 = 27784
Step 47: 27784 + 604 = 28388
Step 48: 28388 + 604 = 28992
Step 49: 28992 + 604 = 29596
Step 50: 29596 + 604 = 30200
Step 51: 30200 + 604 = 30804
Step 52: 30804 + 604 = 31408
Step 53: 31408 + 604 = 32012
Step 54: 32012 + 604 = 32616
Step 55: 32616 + 604 = 33220
Step 56: 33220 + 604 = 33824
Step 57: 33824 + 604 = 34428
Step 58: 34428 + 604 = 35032
Step 59: 35032 + 604 = 35636
Step 60: 35636 + 604 = 36240
Step 61: 36240 + 604 = 36844
Step 62: 36844 + 604 = 37448
Step 63: 37448 + 604 = 38052
Step 64: 38052 + 604 = 38656
Step 65: 38656 + 604 = 39260
Step 66: 39260 + 604 = 39864
Step 67: 39864 + 604 = 40468
Step 68: 40468 + 604 = 41072
Step 69: 41072 + 604 = 41676
Step 70: 41676 + 604 = 42280
Step 71: 42280 + 604 = 42884
Step 72: 42884 + 604 = 43488
Step 73: 43488 + 604 = 44092
Step 74: 44092 + 604 = 44696
Step 75: 44696 + 604 = 45300
Step 76: 45300 + 604 = 45904
Step 77: 45904 + 604 = 46508
Step 78: 46508 + 604 = 47112
Step 79: 47112 + 604 = 47716
Step 80: 47716 + 604 = 48320
Step 81: 48320 + 604 = 48924
Step 82: 48924 + 604 = 49528
Step 83: 49528 + 604 = 50132
Step 84: 50132 + 604 = 50736
Step 85: 50736 + 604 = 51340
Step 86: 51340 + 604 = 51944
Step 87: 51944 + 604 = 52548
Step 88: 52548 + 604 = 53152
Step 89: 53152 + 604 = 53756
Step 90: 53756 + 604 = 54360
Step 91: 54360 + 604 = 54964
Step 92: 54964 + 604 = 55568
Step 93: 55568 + 604 = 56172
Step 94: 56172 + 604 = 56776
Step 95: 56776 + 604 = 57380
Step 96: 57380 + 604 = 57984
Step 97: 57984 + 604 = 58588
Step 98: 58588 + 604 = 59192
Step 99: 59192 + 604 = 59796
Step 100: 59796 + 604 = 60400
Step 101: 60400 + 604 = 61004
Step 102: 61004 + 604 = 61608
Step 103: 61608 + 604 = 62212
Step 104: 62212 + 604 = 62816
Step 105: 62816 + 604 = 63420
Step 106: 63420 + 604 = 64024
Step 107: 64024 + 604 = 64628

So, 604*107 = 64628