Alright, let's solve this math problem step by step. First, we have the number 630. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 51. So, we're going to take the number 630 and add it to itself 51 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

So, 630*51 = 32130