Let's get this math done. We have 491 and we're going to multiply it by 28. This is the same as taking 491 and adding it to itself 28 times.
Step 1: 0 + 491 = 491
Step 2: 491 + 491 = 982
Step 3: 982 + 491 = 1473
Step 4: 1473 + 491 = 1964
Step 5: 1964 + 491 = 2455
Step 6: 2455 + 491 = 2946
Step 7: 2946 + 491 = 3437
Step 8: 3437 + 491 = 3928
Step 9: 3928 + 491 = 4419
Step 10: 4419 + 491 = 4910
Step 11: 4910 + 491 = 5401
Step 12: 5401 + 491 = 5892
Step 13: 5892 + 491 = 6383
Step 14: 6383 + 491 = 6874
Step 15: 6874 + 491 = 7365
Step 16: 7365 + 491 = 7856
Step 17: 7856 + 491 = 8347
Step 18: 8347 + 491 = 8838
Step 19: 8838 + 491 = 9329
Step 20: 9329 + 491 = 9820
Step 21: 9820 + 491 = 10311
Step 22: 10311 + 491 = 10802
Step 23: 10802 + 491 = 11293
Step 24: 11293 + 491 = 11784
Step 25: 11784 + 491 = 12275
Step 26: 12275 + 491 = 12766
Step 27: 12766 + 491 = 13257
Step 28: 13257 + 491 = 13748

So, 491*28 = 13748