Alright, let's solve this math problem step by step. First, we have the number 765. 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 765 and add it to itself 25 times.
Step 1: 0 + 765 = 765
Step 2: 765 + 765 = 1530
Step 3: 1530 + 765 = 2295
Step 4: 2295 + 765 = 3060
Step 5: 3060 + 765 = 3825
Step 6: 3825 + 765 = 4590
Step 7: 4590 + 765 = 5355
Step 8: 5355 + 765 = 6120
Step 9: 6120 + 765 = 6885
Step 10: 6885 + 765 = 7650
Step 11: 7650 + 765 = 8415
Step 12: 8415 + 765 = 9180
Step 13: 9180 + 765 = 9945
Step 14: 9945 + 765 = 10710
Step 15: 10710 + 765 = 11475
Step 16: 11475 + 765 = 12240
Step 17: 12240 + 765 = 13005
Step 18: 13005 + 765 = 13770
Step 19: 13770 + 765 = 14535
Step 20: 14535 + 765 = 15300
Step 21: 15300 + 765 = 16065
Step 22: 16065 + 765 = 16830
Step 23: 16830 + 765 = 17595
Step 24: 17595 + 765 = 18360
Step 25: 18360 + 765 = 19125

So, 765*25 = 19125