OK, let's work through this together. We're starting with 300 and we're going to multiply it by 24, which means we add 300 to itself 24 times.
Step 1: 0 + 300 = 300
Step 2: 300 + 300 = 600
Step 3: 600 + 300 = 900
Step 4: 900 + 300 = 1200
Step 5: 1200 + 300 = 1500
Step 6: 1500 + 300 = 1800
Step 7: 1800 + 300 = 2100
Step 8: 2100 + 300 = 2400
Step 9: 2400 + 300 = 2700
Step 10: 2700 + 300 = 3000
Step 11: 3000 + 300 = 3300
Step 12: 3300 + 300 = 3600
Step 13: 3600 + 300 = 3900
Step 14: 3900 + 300 = 4200
Step 15: 4200 + 300 = 4500
Step 16: 4500 + 300 = 4800
Step 17: 4800 + 300 = 5100
Step 18: 5100 + 300 = 5400
Step 19: 5400 + 300 = 5700
Step 20: 5700 + 300 = 6000
Step 21: 6000 + 300 = 6300
Step 22: 6300 + 300 = 6600
Step 23: 6600 + 300 = 6900
Step 24: 6900 + 300 = 7200

So, 300*24 = 7200