1. First open word, enter formulas and numbers in the document, click the cursor in the middle of them, and press the tab key on the keyboard.

2. The cursor selects all contents. In the start interface, click the arrow symbol in the lower right corner of the paragraph.

3. The interface jumps, click the tab stop icon in the lower left corner.

4. In the position, set 20 characters with the alignment centered. Click the Settings icon at the bottom.

5. Set 40 characters in this position, and the alignment mode is right alignment. Click the Settings icon at the bottom. After adding two locations, click OK at the bottom.

6. Click the cursor in front of the formula, and then press the tab key on the keyboard. At this point, the formula number has been set.