u wrote units for answer but not the question.
if the rectangle is 51 inch X 83 inch,
answer would be 4233 square inches.
if the rectangle is 51 m X 83 m, answer would be approximately 6561163.10894147188977 square inches.
it seems that first answer is what you are looking for.
320 square inches
1,296 square inches.
There are 144 square inches in a square foot. This calculates out to be 5,040 square inches.
A square of 17.5 inches by 17.5 inches is 2.13 square feet.
10,656 square inches.
21,600 square inches.
288 square inches.
2592 square inches
3,024 square inches.
324 square inches
There are 144 square inches in a square foot. The answer would be 11,232 square inches.
There are 144 square inches in a square foot. Which means there are 72 square inches.