Final answer:
The volume of the birdcage is 2800 cubic inches.
Step-by-step explanation:
To calculate the volume of a rectangular prism, you multiply its length, width, and height together. In this case, the length is 14 inches, the width is 10 inches, and the height is 20 inches. So, the volume of the birdcage is 14 x 10 x 20 = 2800 cubic inches.