仔细观察右边图片，图中括号中分别应该填几？（请用小学三年级的数学知识解答）---**Diagram Description:** The image contains a large rectangle (likely a square as it is divided into proportional parts) divided into four smaller rectangular areas by a vertical line and two horizontal lines on the right side of the vertical line. - The area on the left side occupies the full height of the large rectangle and contains the number "400". - The right side is divided horizontally into three areas from top to bottom. - The top-right area is a small rectangle and contains the symbols "()". - The middle-right area is a medium-sized rectangle and contains the symbols "()". - The bottom-right area is a medium-sized rectangle and contains the number "200". **Textual Content:** - 400 - () - () - 200