Answer:
Step-by-step explanation:
This is simple: we need to only do 2 steps
1) Convert to feet
2) Get the area
1) Converting to feet is just
[tex](7*3, 4*3)\\[/tex] (ignore the use of this it's just to show the differnt things to multiply
Now we have a length of 21 and a width of 12 FEET.
2) To solve for the area, we need to multiply both dimensions.
[tex]21*12=252[/tex]
So the answer is 252^2 FEET (DONT FORGET THE UNIT SQUARE FEET)