Alright, let's solve this math problem step by step. First, we have the number 393. 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 393 and add it to itself 25 times.
Step 1: 0 + 393 = 393
Step 2: 393 + 393 = 786
Step 3: 786 + 393 = 1179
Step 4: 1179 + 393 = 1572
Step 5: 1572 + 393 = 1965
Step 6: 1965 + 393 = 2358
Step 7: 2358 + 393 = 2751
Step 8: 2751 + 393 = 3144
Step 9: 3144 + 393 = 3537
Step 10: 3537 + 393 = 3930
Step 11: 3930 + 393 = 4323
Step 12: 4323 + 393 = 4716
Step 13: 4716 + 393 = 5109
Step 14: 5109 + 393 = 5502
Step 15: 5502 + 393 = 5895
Step 16: 5895 + 393 = 6288
Step 17: 6288 + 393 = 6681
Step 18: 6681 + 393 = 7074
Step 19: 7074 + 393 = 7467
Step 20: 7467 + 393 = 7860
Step 21: 7860 + 393 = 8253
Step 22: 8253 + 393 = 8646
Step 23: 8646 + 393 = 9039
Step 24: 9039 + 393 = 9432
Step 25: 9432 + 393 = 9825

So, 393*25 = 9825