Answer:
well if your asking for 21 x 23 its 483
Step-by-step explanation:
Hi if the awnser for the equation is not the anwser your looking for please comment so I can help you with something else and here how you get the anwser you can break 21 and 23 down so 20 +1 and 20+ 3 then these steps or array.
20x20=400
20x1=20
20x3=60
3x1=3
Now add those numbers together you get 483
