2. The area of the two gardens =2*3. 14*5*5= 157.

3. Large rectangle-two circular areas = 43 = eight triangle-like areas.

4. The area of each triangle =43/8=5.375.

5. The required shadow area is 3, plus about 2/3.

6, therefore, the required area is approximately equal to 5.375 * 3.667 = 19.7438+0.