The method and formula to solve the Nine Palace Box question were as follows: 1 Arrange the numbers in the nine-square grid in order from small to large so that each row, column, and corner of the nine-square grid contains any one of the numbers 1-9. 2 Find the number in each row, column, and corner of the grid and use the formula to find the answer. 3. The common formulas for solving the nine-palace grid questions include: - In-line formula: Add, subtract, multiply, and divide each number in the line and then sum it. For example,(3+4)×5+2=16 means that the sum of the numbers in the five corners of the three rows, four columns is 16. - In-column formula: Add, subtract, multiply, and divide each number in the column and then sum them. For example,(3+4) div6 +1=2 meant that the sum of the numbers in the four corners of the three columns was 2. - Nine Palace Box Corner Formula: Using the special nature of the corner numbers, each number in the corresponding corner is added, multiplied, and divided, and then summed. For example, 1+8+5=16 meant that the sum of the numbers in one corner was 16. Note that the formula for solving the nine-palace grid question may vary from question to question in practice. Therefore, the reader needed to choose the appropriate formula to solve it according to the specific situation.