Alright, let's solve this math problem step by step. First, we have the number 658. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 39. So, we're going to take the number 658 and add it to itself 39 times.
Step 1: 0 + 658 = 658
Step 2: 658 + 658 = 1316
Step 3: 1316 + 658 = 1974
Step 4: 1974 + 658 = 2632
Step 5: 2632 + 658 = 3290
Step 6: 3290 + 658 = 3948
Step 7: 3948 + 658 = 4606
Step 8: 4606 + 658 = 5264
Step 9: 5264 + 658 = 5922
Step 10: 5922 + 658 = 6580
Step 11: 6580 + 658 = 7238
Step 12: 7238 + 658 = 7896
Step 13: 7896 + 658 = 8554
Step 14: 8554 + 658 = 9212
Step 15: 9212 + 658 = 9870
Step 16: 9870 + 658 = 10528
Step 17: 10528 + 658 = 11186
Step 18: 11186 + 658 = 11844
Step 19: 11844 + 658 = 12502
Step 20: 12502 + 658 = 13160
Step 21: 13160 + 658 = 13818
Step 22: 13818 + 658 = 14476
Step 23: 14476 + 658 = 15134
Step 24: 15134 + 658 = 15792
Step 25: 15792 + 658 = 16450
Step 26: 16450 + 658 = 17108
Step 27: 17108 + 658 = 17766
Step 28: 17766 + 658 = 18424
Step 29: 18424 + 658 = 19082
Step 30: 19082 + 658 = 19740
Step 31: 19740 + 658 = 20398
Step 32: 20398 + 658 = 21056
Step 33: 21056 + 658 = 21714
Step 34: 21714 + 658 = 22372
Step 35: 22372 + 658 = 23030
Step 36: 23030 + 658 = 23688
Step 37: 23688 + 658 = 24346
Step 38: 24346 + 658 = 25004
Step 39: 25004 + 658 = 25662

So, 658*39 = 25662