Alright, let's solve this math problem step by step. First, we have the number 720. 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 720 and add it to itself 25 times.
Step 1: 0 + 720 = 720
Step 2: 720 + 720 = 1440
Step 3: 1440 + 720 = 2160
Step 4: 2160 + 720 = 2880
Step 5: 2880 + 720 = 3600
Step 6: 3600 + 720 = 4320
Step 7: 4320 + 720 = 5040
Step 8: 5040 + 720 = 5760
Step 9: 5760 + 720 = 6480
Step 10: 6480 + 720 = 7200
Step 11: 7200 + 720 = 7920
Step 12: 7920 + 720 = 8640
Step 13: 8640 + 720 = 9360
Step 14: 9360 + 720 = 10080
Step 15: 10080 + 720 = 10800
Step 16: 10800 + 720 = 11520
Step 17: 11520 + 720 = 12240
Step 18: 12240 + 720 = 12960
Step 19: 12960 + 720 = 13680
Step 20: 13680 + 720 = 14400
Step 21: 14400 + 720 = 15120
Step 22: 15120 + 720 = 15840
Step 23: 15840 + 720 = 16560
Step 24: 16560 + 720 = 17280
Step 25: 17280 + 720 = 18000

So, 720*25 = 18000