OK, let's work through this together. We're starting with 547 and we're going to multiply it by 28, which means we add 547 to itself 28 times.
Step 1: 0 + 547 = 547
Step 2: 547 + 547 = 1094
Step 3: 1094 + 547 = 1641
Step 4: 1641 + 547 = 2188
Step 5: 2188 + 547 = 2735
Step 6: 2735 + 547 = 3282
Step 7: 3282 + 547 = 3829
Step 8: 3829 + 547 = 4376
Step 9: 4376 + 547 = 4923
Step 10: 4923 + 547 = 5470
Step 11: 5470 + 547 = 6017
Step 12: 6017 + 547 = 6564
Step 13: 6564 + 547 = 7111
Step 14: 7111 + 547 = 7658
Step 15: 7658 + 547 = 8205
Step 16: 8205 + 547 = 8752
Step 17: 8752 + 547 = 9299
Step 18: 9299 + 547 = 9846
Step 19: 9846 + 547 = 10393
Step 20: 10393 + 547 = 10940
Step 21: 10940 + 547 = 11487
Step 22: 11487 + 547 = 12034
Step 23: 12034 + 547 = 12581
Step 24: 12581 + 547 = 13128
Step 25: 13128 + 547 = 13675
Step 26: 13675 + 547 = 14222
Step 27: 14222 + 547 = 14769
Step 28: 14769 + 547 = 15316

So, 547*28 = 15316