Alright, let's solve this math problem step by step. First, we have the number 258. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 28. So, we're going to take the number 258 and add it to itself 28 times.
Step 1: 0 + 258 = 258
Step 2: 258 + 258 = 516
Step 3: 516 + 258 = 774
Step 4: 774 + 258 = 1032
Step 5: 1032 + 258 = 1290
Step 6: 1290 + 258 = 1548
Step 7: 1548 + 258 = 1806
Step 8: 1806 + 258 = 2064
Step 9: 2064 + 258 = 2322
Step 10: 2322 + 258 = 2580
Step 11: 2580 + 258 = 2838
Step 12: 2838 + 258 = 3096
Step 13: 3096 + 258 = 3354
Step 14: 3354 + 258 = 3612
Step 15: 3612 + 258 = 3870
Step 16: 3870 + 258 = 4128
Step 17: 4128 + 258 = 4386
Step 18: 4386 + 258 = 4644
Step 19: 4644 + 258 = 4902
Step 20: 4902 + 258 = 5160
Step 21: 5160 + 258 = 5418
Step 22: 5418 + 258 = 5676
Step 23: 5676 + 258 = 5934
Step 24: 5934 + 258 = 6192
Step 25: 6192 + 258 = 6450
Step 26: 6450 + 258 = 6708
Step 27: 6708 + 258 = 6966
Step 28: 6966 + 258 = 7224

So, 258*28 = 7224