OK, let's work through this together. We're starting with 675 and we're going to multiply it by 43, which means we add 675 to itself 43 times.
Step 1: 0 + 675 = 675
Step 2: 675 + 675 = 1350
Step 3: 1350 + 675 = 2025
Step 4: 2025 + 675 = 2700
Step 5: 2700 + 675 = 3375
Step 6: 3375 + 675 = 4050
Step 7: 4050 + 675 = 4725
Step 8: 4725 + 675 = 5400
Step 9: 5400 + 675 = 6075
Step 10: 6075 + 675 = 6750
Step 11: 6750 + 675 = 7425
Step 12: 7425 + 675 = 8100
Step 13: 8100 + 675 = 8775
Step 14: 8775 + 675 = 9450
Step 15: 9450 + 675 = 10125
Step 16: 10125 + 675 = 10800
Step 17: 10800 + 675 = 11475
Step 18: 11475 + 675 = 12150
Step 19: 12150 + 675 = 12825
Step 20: 12825 + 675 = 13500
Step 21: 13500 + 675 = 14175
Step 22: 14175 + 675 = 14850
Step 23: 14850 + 675 = 15525
Step 24: 15525 + 675 = 16200
Step 25: 16200 + 675 = 16875
Step 26: 16875 + 675 = 17550
Step 27: 17550 + 675 = 18225
Step 28: 18225 + 675 = 18900
Step 29: 18900 + 675 = 19575
Step 30: 19575 + 675 = 20250
Step 31: 20250 + 675 = 20925
Step 32: 20925 + 675 = 21600
Step 33: 21600 + 675 = 22275
Step 34: 22275 + 675 = 22950
Step 35: 22950 + 675 = 23625
Step 36: 23625 + 675 = 24300
Step 37: 24300 + 675 = 24975
Step 38: 24975 + 675 = 25650
Step 39: 25650 + 675 = 26325
Step 40: 26325 + 675 = 27000
Step 41: 27000 + 675 = 27675
Step 42: 27675 + 675 = 28350
Step 43: 28350 + 675 = 29025

So, 675*43 = 29025