OK, let's work through this together. We're starting with 622 and we're going to multiply it by 73, which means we add 622 to itself 73 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
Step 52: 31722 + 622 = 32344
Step 53: 32344 + 622 = 32966
Step 54: 32966 + 622 = 33588
Step 55: 33588 + 622 = 34210
Step 56: 34210 + 622 = 34832
Step 57: 34832 + 622 = 35454
Step 58: 35454 + 622 = 36076
Step 59: 36076 + 622 = 36698
Step 60: 36698 + 622 = 37320
Step 61: 37320 + 622 = 37942
Step 62: 37942 + 622 = 38564
Step 63: 38564 + 622 = 39186
Step 64: 39186 + 622 = 39808
Step 65: 39808 + 622 = 40430
Step 66: 40430 + 622 = 41052
Step 67: 41052 + 622 = 41674
Step 68: 41674 + 622 = 42296
Step 69: 42296 + 622 = 42918
Step 70: 42918 + 622 = 43540
Step 71: 43540 + 622 = 44162
Step 72: 44162 + 622 = 44784
Step 73: 44784 + 622 = 45406

So, 622*73 = 45406