OK, let's work through this together. We're starting with 277 and we're going to multiply it by 28, which means we add 277 to itself 28 times.
Step 1: 0 + 277 = 277
Step 2: 277 + 277 = 554
Step 3: 554 + 277 = 831
Step 4: 831 + 277 = 1108
Step 5: 1108 + 277 = 1385
Step 6: 1385 + 277 = 1662
Step 7: 1662 + 277 = 1939
Step 8: 1939 + 277 = 2216
Step 9: 2216 + 277 = 2493
Step 10: 2493 + 277 = 2770
Step 11: 2770 + 277 = 3047
Step 12: 3047 + 277 = 3324
Step 13: 3324 + 277 = 3601
Step 14: 3601 + 277 = 3878
Step 15: 3878 + 277 = 4155
Step 16: 4155 + 277 = 4432
Step 17: 4432 + 277 = 4709
Step 18: 4709 + 277 = 4986
Step 19: 4986 + 277 = 5263
Step 20: 5263 + 277 = 5540
Step 21: 5540 + 277 = 5817
Step 22: 5817 + 277 = 6094
Step 23: 6094 + 277 = 6371
Step 24: 6371 + 277 = 6648
Step 25: 6648 + 277 = 6925
Step 26: 6925 + 277 = 7202
Step 27: 7202 + 277 = 7479
Step 28: 7479 + 277 = 7756

So, 277*28 = 7756