Sure thing! We've got 798 and we're gonna multiply it by 28. That's the same as adding 798 to itself 28 times.
Step 1: 0 + 798 = 798
Step 2: 798 + 798 = 1596
Step 3: 1596 + 798 = 2394
Step 4: 2394 + 798 = 3192
Step 5: 3192 + 798 = 3990
Step 6: 3990 + 798 = 4788
Step 7: 4788 + 798 = 5586
Step 8: 5586 + 798 = 6384
Step 9: 6384 + 798 = 7182
Step 10: 7182 + 798 = 7980
Step 11: 7980 + 798 = 8778
Step 12: 8778 + 798 = 9576
Step 13: 9576 + 798 = 10374
Step 14: 10374 + 798 = 11172
Step 15: 11172 + 798 = 11970
Step 16: 11970 + 798 = 12768
Step 17: 12768 + 798 = 13566
Step 18: 13566 + 798 = 14364
Step 19: 14364 + 798 = 15162
Step 20: 15162 + 798 = 15960
Step 21: 15960 + 798 = 16758
Step 22: 16758 + 798 = 17556
Step 23: 17556 + 798 = 18354
Step 24: 18354 + 798 = 19152
Step 25: 19152 + 798 = 19950
Step 26: 19950 + 798 = 20748
Step 27: 20748 + 798 = 21546
Step 28: 21546 + 798 = 22344

So, 798*28 = 22344