3. (10 points) Taoqi cut out the largest circle from a square piece of paper (as shown in Figure A), and Xiaoxiao cut out seven equal largest circles from a circular piece of paper (as shown in Figure B). Among these two cutting methods, which one has the highest utilization rate? (The utilization rate refers to the percentage of the area of the cut-out circles to the original shape's area) Which of the following statements is correct?
A. Taoqi's cutting method has a higher utilization rate
B. Xiaoxiao's cutting method has a higher utilization rate
C. Both cutting methods have the same utilization rate
D. Cannot determine

Please retain the original text's line breaks and format, and output the translation directly.
【Analysis】To determine the utilization rate of two individuals, Taoqi cut out the largest circle from a square piece of paper (as shown in Figure A), while Xiaoxiao cut out seven equal largest circles from a circular piece of paper (as shown in Figure B). Assuming the side length of the square is 9 cm, we can calculate the area of the circle and then compare the utilization rates.

【Solution】Let the side length of the square be 9 cm,
then the area of the square is: $9 \times 9=81$ (square cm)
Taoqi: The radius of the circle is $9 \div 2=4.5$ (cm)
The area of the material used is $3.14 \times 4.5^{2}$
$=3.14 \times 20.25$
$=63.585$ (square cm);
$63.585 \div 81$
$=0.785$
$=78.5 \% ;$
Xiaoxiao: The diameter of the large circle is 9 cm,
The radius of the small circles is $9 \div 3 \div 2=1.5$ (cm),
$3.14 \times 1.5^{2} \times 7$
$=3.14 \times 2.25 \times 7$
$=49.455$ (square cm);
$49.455 \div 63.585$
$\approx 0.778$
$=77.8 \%$;
$78.5 \%>77.8 \%$.
Answer: Taoqi has a higher utilization rate.
Therefore, the correct choice is: A.