Sure thing, let's get straight to it. We start with 798 and we're going to multiply it by 55, which means adding 798 to itself 55 times.
Step 1: 0 + 798 = 798
Step 2: 798 + 798 = 1596
Step 3: 1596 + 798 = 2394
Step 4: 2394 + 798 = 3192
Step 5: 3192 + 798 = 3990
Step 6: 3990 + 798 = 4788
Step 7: 4788 + 798 = 5586
Step 8: 5586 + 798 = 6384
Step 9: 6384 + 798 = 7182
Step 10: 7182 + 798 = 7980
Step 11: 7980 + 798 = 8778
Step 12: 8778 + 798 = 9576
Step 13: 9576 + 798 = 10374
Step 14: 10374 + 798 = 11172
Step 15: 11172 + 798 = 11970
Step 16: 11970 + 798 = 12768
Step 17: 12768 + 798 = 13566
Step 18: 13566 + 798 = 14364
Step 19: 14364 + 798 = 15162
Step 20: 15162 + 798 = 15960
Step 21: 15960 + 798 = 16758
Step 22: 16758 + 798 = 17556
Step 23: 17556 + 798 = 18354
Step 24: 18354 + 798 = 19152
Step 25: 19152 + 798 = 19950
Step 26: 19950 + 798 = 20748
Step 27: 20748 + 798 = 21546
Step 28: 21546 + 798 = 22344
Step 29: 22344 + 798 = 23142
Step 30: 23142 + 798 = 23940
Step 31: 23940 + 798 = 24738
Step 32: 24738 + 798 = 25536
Step 33: 25536 + 798 = 26334
Step 34: 26334 + 798 = 27132
Step 35: 27132 + 798 = 27930
Step 36: 27930 + 798 = 28728
Step 37: 28728 + 798 = 29526
Step 38: 29526 + 798 = 30324
Step 39: 30324 + 798 = 31122
Step 40: 31122 + 798 = 31920
Step 41: 31920 + 798 = 32718
Step 42: 32718 + 798 = 33516
Step 43: 33516 + 798 = 34314
Step 44: 34314 + 798 = 35112
Step 45: 35112 + 798 = 35910
Step 46: 35910 + 798 = 36708
Step 47: 36708 + 798 = 37506
Step 48: 37506 + 798 = 38304
Step 49: 38304 + 798 = 39102
Step 50: 39102 + 798 = 39900
Step 51: 39900 + 798 = 40698
Step 52: 40698 + 798 = 41496
Step 53: 41496 + 798 = 42294
Step 54: 42294 + 798 = 43092
Step 55: 43092 + 798 = 43890

So, 798*55 = 43890