OK, let's work through this together. We're starting with 630 and we're going to multiply it by 104, which means we add 630 to itself 104 times.
Step 1: 0 + 630 = 630
Step 2: 630 + 630 = 1260
Step 3: 1260 + 630 = 1890
Step 4: 1890 + 630 = 2520
Step 5: 2520 + 630 = 3150
Step 6: 3150 + 630 = 3780
Step 7: 3780 + 630 = 4410
Step 8: 4410 + 630 = 5040
Step 9: 5040 + 630 = 5670
Step 10: 5670 + 630 = 6300
Step 11: 6300 + 630 = 6930
Step 12: 6930 + 630 = 7560
Step 13: 7560 + 630 = 8190
Step 14: 8190 + 630 = 8820
Step 15: 8820 + 630 = 9450
Step 16: 9450 + 630 = 10080
Step 17: 10080 + 630 = 10710
Step 18: 10710 + 630 = 11340
Step 19: 11340 + 630 = 11970
Step 20: 11970 + 630 = 12600
Step 21: 12600 + 630 = 13230
Step 22: 13230 + 630 = 13860
Step 23: 13860 + 630 = 14490
Step 24: 14490 + 630 = 15120
Step 25: 15120 + 630 = 15750
Step 26: 15750 + 630 = 16380
Step 27: 16380 + 630 = 17010
Step 28: 17010 + 630 = 17640
Step 29: 17640 + 630 = 18270
Step 30: 18270 + 630 = 18900
Step 31: 18900 + 630 = 19530
Step 32: 19530 + 630 = 20160
Step 33: 20160 + 630 = 20790
Step 34: 20790 + 630 = 21420
Step 35: 21420 + 630 = 22050
Step 36: 22050 + 630 = 22680
Step 37: 22680 + 630 = 23310
Step 38: 23310 + 630 = 23940
Step 39: 23940 + 630 = 24570
Step 40: 24570 + 630 = 25200
Step 41: 25200 + 630 = 25830
Step 42: 25830 + 630 = 26460
Step 43: 26460 + 630 = 27090
Step 44: 27090 + 630 = 27720
Step 45: 27720 + 630 = 28350
Step 46: 28350 + 630 = 28980
Step 47: 28980 + 630 = 29610
Step 48: 29610 + 630 = 30240
Step 49: 30240 + 630 = 30870
Step 50: 30870 + 630 = 31500
Step 51: 31500 + 630 = 32130
Step 52: 32130 + 630 = 32760
Step 53: 32760 + 630 = 33390
Step 54: 33390 + 630 = 34020
Step 55: 34020 + 630 = 34650
Step 56: 34650 + 630 = 35280
Step 57: 35280 + 630 = 35910
Step 58: 35910 + 630 = 36540
Step 59: 36540 + 630 = 37170
Step 60: 37170 + 630 = 37800
Step 61: 37800 + 630 = 38430
Step 62: 38430 + 630 = 39060
Step 63: 39060 + 630 = 39690
Step 64: 39690 + 630 = 40320
Step 65: 40320 + 630 = 40950
Step 66: 40950 + 630 = 41580
Step 67: 41580 + 630 = 42210
Step 68: 42210 + 630 = 42840
Step 69: 42840 + 630 = 43470
Step 70: 43470 + 630 = 44100
Step 71: 44100 + 630 = 44730
Step 72: 44730 + 630 = 45360
Step 73: 45360 + 630 = 45990
Step 74: 45990 + 630 = 46620
Step 75: 46620 + 630 = 47250
Step 76: 47250 + 630 = 47880
Step 77: 47880 + 630 = 48510
Step 78: 48510 + 630 = 49140
Step 79: 49140 + 630 = 49770
Step 80: 49770 + 630 = 50400
Step 81: 50400 + 630 = 51030
Step 82: 51030 + 630 = 51660
Step 83: 51660 + 630 = 52290
Step 84: 52290 + 630 = 52920
Step 85: 52920 + 630 = 53550
Step 86: 53550 + 630 = 54180
Step 87: 54180 + 630 = 54810
Step 88: 54810 + 630 = 55440
Step 89: 55440 + 630 = 56070
Step 90: 56070 + 630 = 56700
Step 91: 56700 + 630 = 57330
Step 92: 57330 + 630 = 57960
Step 93: 57960 + 630 = 58590
Step 94: 58590 + 630 = 59220
Step 95: 59220 + 630 = 59850
Step 96: 59850 + 630 = 60480
Step 97: 60480 + 630 = 61110
Step 98: 61110 + 630 = 61740
Step 99: 61740 + 630 = 62370
Step 100: 62370 + 630 = 63000
Step 101: 63000 + 630 = 63630
Step 102: 63630 + 630 = 64260
Step 103: 64260 + 630 = 64890
Step 104: 64890 + 630 = 65520

So, 630*104 = 65520