OK, let's crack this. We're given 150 and our task is to multiply it by 54. Essentially, we'll be adding 150 to itself 54 times.
Step 1: 0 + 150 = 150
Step 2: 150 + 150 = 300
Step 3: 300 + 150 = 450
Step 4: 450 + 150 = 600
Step 5: 600 + 150 = 750
Step 6: 750 + 150 = 900
Step 7: 900 + 150 = 1050
Step 8: 1050 + 150 = 1200
Step 9: 1200 + 150 = 1350
Step 10: 1350 + 150 = 1500
Step 11: 1500 + 150 = 1650
Step 12: 1650 + 150 = 1800
Step 13: 1800 + 150 = 1950
Step 14: 1950 + 150 = 2100
Step 15: 2100 + 150 = 2250
Step 16: 2250 + 150 = 2400
Step 17: 2400 + 150 = 2550
Step 18: 2550 + 150 = 2700
Step 19: 2700 + 150 = 2850
Step 20: 2850 + 150 = 3000
Step 21: 3000 + 150 = 3150
Step 22: 3150 + 150 = 3300
Step 23: 3300 + 150 = 3450
Step 24: 3450 + 150 = 3600
Step 25: 3600 + 150 = 3750
Step 26: 3750 + 150 = 3900
Step 27: 3900 + 150 = 4050
Step 28: 4050 + 150 = 4200
Step 29: 4200 + 150 = 4350
Step 30: 4350 + 150 = 4500
Step 31: 4500 + 150 = 4650
Step 32: 4650 + 150 = 4800
Step 33: 4800 + 150 = 4950
Step 34: 4950 + 150 = 5100
Step 35: 5100 + 150 = 5250
Step 36: 5250 + 150 = 5400
Step 37: 5400 + 150 = 5550
Step 38: 5550 + 150 = 5700
Step 39: 5700 + 150 = 5850
Step 40: 5850 + 150 = 6000
Step 41: 6000 + 150 = 6150
Step 42: 6150 + 150 = 6300
Step 43: 6300 + 150 = 6450
Step 44: 6450 + 150 = 6600
Step 45: 6600 + 150 = 6750
Step 46: 6750 + 150 = 6900
Step 47: 6900 + 150 = 7050
Step 48: 7050 + 150 = 7200
Step 49: 7200 + 150 = 7350
Step 50: 7350 + 150 = 7500
Step 51: 7500 + 150 = 7650
Step 52: 7650 + 150 = 7800
Step 53: 7800 + 150 = 7950
Step 54: 7950 + 150 = 8100

So, 150*54 = 8100