If the side length of that square is 3, then the radius of the big round table is 1.5, and the radius of each small round stool surface is 0.5.

The area of the great circle is1.5 2π (π = 3.14), and the area of each small circle is 0.5 2π (π = 3.14). Because there are nine small circles, the sum of the areas of the nine small circles is 0.5 2 π× 9. Calculate 1.5 2 π or 0.5 2 π× 9, which is greater. Which one is bigger and which one has higher utilization rate.

Finally, it is concluded that their utilization rate is also very high.