OK, let's crack this. We're given 622 and our task is to multiply it by 51. Essentially, we'll be adding 622 to itself 51 times.
Step 1: 0 + 622 = 622
Step 2: 622 + 622 = 1244
Step 3: 1244 + 622 = 1866
Step 4: 1866 + 622 = 2488
Step 5: 2488 + 622 = 3110
Step 6: 3110 + 622 = 3732
Step 7: 3732 + 622 = 4354
Step 8: 4354 + 622 = 4976
Step 9: 4976 + 622 = 5598
Step 10: 5598 + 622 = 6220
Step 11: 6220 + 622 = 6842
Step 12: 6842 + 622 = 7464
Step 13: 7464 + 622 = 8086
Step 14: 8086 + 622 = 8708
Step 15: 8708 + 622 = 9330
Step 16: 9330 + 622 = 9952
Step 17: 9952 + 622 = 10574
Step 18: 10574 + 622 = 11196
Step 19: 11196 + 622 = 11818
Step 20: 11818 + 622 = 12440
Step 21: 12440 + 622 = 13062
Step 22: 13062 + 622 = 13684
Step 23: 13684 + 622 = 14306
Step 24: 14306 + 622 = 14928
Step 25: 14928 + 622 = 15550
Step 26: 15550 + 622 = 16172
Step 27: 16172 + 622 = 16794
Step 28: 16794 + 622 = 17416
Step 29: 17416 + 622 = 18038
Step 30: 18038 + 622 = 18660
Step 31: 18660 + 622 = 19282
Step 32: 19282 + 622 = 19904
Step 33: 19904 + 622 = 20526
Step 34: 20526 + 622 = 21148
Step 35: 21148 + 622 = 21770
Step 36: 21770 + 622 = 22392
Step 37: 22392 + 622 = 23014
Step 38: 23014 + 622 = 23636
Step 39: 23636 + 622 = 24258
Step 40: 24258 + 622 = 24880
Step 41: 24880 + 622 = 25502
Step 42: 25502 + 622 = 26124
Step 43: 26124 + 622 = 26746
Step 44: 26746 + 622 = 27368
Step 45: 27368 + 622 = 27990
Step 46: 27990 + 622 = 28612
Step 47: 28612 + 622 = 29234
Step 48: 29234 + 622 = 29856
Step 49: 29856 + 622 = 30478
Step 50: 30478 + 622 = 31100
Step 51: 31100 + 622 = 31722

So, 622*51 = 31722