Alright, let's solve this math problem step by step. First, we have the number 300. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 25. So, we're going to take the number 300 and add it to itself 25 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
Step 25: 7200 + 300 = 7500

So, 300*25 = 7500