Alright, let's solve this math problem step by step. First, we have the number 728. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 23. So, we're going to take the number 728 and add it to itself 23 times.
Step 1: 0 + 728 = 728
Step 2: 728 + 728 = 1456
Step 3: 1456 + 728 = 2184
Step 4: 2184 + 728 = 2912
Step 5: 2912 + 728 = 3640
Step 6: 3640 + 728 = 4368
Step 7: 4368 + 728 = 5096
Step 8: 5096 + 728 = 5824
Step 9: 5824 + 728 = 6552
Step 10: 6552 + 728 = 7280
Step 11: 7280 + 728 = 8008
Step 12: 8008 + 728 = 8736
Step 13: 8736 + 728 = 9464
Step 14: 9464 + 728 = 10192
Step 15: 10192 + 728 = 10920
Step 16: 10920 + 728 = 11648
Step 17: 11648 + 728 = 12376
Step 18: 12376 + 728 = 13104
Step 19: 13104 + 728 = 13832
Step 20: 13832 + 728 = 14560
Step 21: 14560 + 728 = 15288
Step 22: 15288 + 728 = 16016
Step 23: 16016 + 728 = 16744

So, 728*23 = 16744