The rectangle below has an area of $9721\times3$. The rectangle is decomposed into four smaller rectangles with the side lengths labeled in the figure. **What is the area of rectangles $A$, $B$, $C$, and $D?$** | | - | - | - $A=$ | [[☃ math-keypad 1]] $B=$ | [[☃ math-keypad 2]] $C=$ | [[☃ math-keypad 3]] $D=$ | [[☃ math-keypad 4]] **What is $9721\times3?$** [[☃ math-keypad 5]]