OK, let's work through this together. We're starting with 628 and we're going to multiply it by 49, which means we add 628 to itself 49 times.
Step 1: 0 + 628 = 628
Step 2: 628 + 628 = 1256
Step 3: 1256 + 628 = 1884
Step 4: 1884 + 628 = 2512
Step 5: 2512 + 628 = 3140
Step 6: 3140 + 628 = 3768
Step 7: 3768 + 628 = 4396
Step 8: 4396 + 628 = 5024
Step 9: 5024 + 628 = 5652
Step 10: 5652 + 628 = 6280
Step 11: 6280 + 628 = 6908
Step 12: 6908 + 628 = 7536
Step 13: 7536 + 628 = 8164
Step 14: 8164 + 628 = 8792
Step 15: 8792 + 628 = 9420
Step 16: 9420 + 628 = 10048
Step 17: 10048 + 628 = 10676
Step 18: 10676 + 628 = 11304
Step 19: 11304 + 628 = 11932
Step 20: 11932 + 628 = 12560
Step 21: 12560 + 628 = 13188
Step 22: 13188 + 628 = 13816
Step 23: 13816 + 628 = 14444
Step 24: 14444 + 628 = 15072
Step 25: 15072 + 628 = 15700
Step 26: 15700 + 628 = 16328
Step 27: 16328 + 628 = 16956
Step 28: 16956 + 628 = 17584
Step 29: 17584 + 628 = 18212
Step 30: 18212 + 628 = 18840
Step 31: 18840 + 628 = 19468
Step 32: 19468 + 628 = 20096
Step 33: 20096 + 628 = 20724
Step 34: 20724 + 628 = 21352
Step 35: 21352 + 628 = 21980
Step 36: 21980 + 628 = 22608
Step 37: 22608 + 628 = 23236
Step 38: 23236 + 628 = 23864
Step 39: 23864 + 628 = 24492
Step 40: 24492 + 628 = 25120
Step 41: 25120 + 628 = 25748
Step 42: 25748 + 628 = 26376
Step 43: 26376 + 628 = 27004
Step 44: 27004 + 628 = 27632
Step 45: 27632 + 628 = 28260
Step 46: 28260 + 628 = 28888
Step 47: 28888 + 628 = 29516
Step 48: 29516 + 628 = 30144
Step 49: 30144 + 628 = 30772

So, 628*49 = 30772