To circle a number or a cell in Excel, follow these steps:
[list=1][*]Select the cell that you want to circle.[*]Click on the "Insert" tab in the ribbon.[*]Click on the "Shapes" button in the "Illustrations" group.[*]Select the circle shape from the "Basic Shapes" section.[*]Click and drag the cursor on the worksheet to draw the circle around the cell.[*]Right-click on the circle and select "Format Shape" from the context menu.[*]In the "Format Shape" dialog box, go to the "Line Style" tab.[*]Choose the color, width, and dash type for the circle.[*]Click "Close" to apply the changes.

Alternatively, you can also use the "Borders" feature to add a circle border around the cell. Here are the steps:

1. Select the cell that you want to circle.
2. Click on the "Home" tab in the ribbon.
3. Click on the "Borders" button in the "Font" group.
4. Select the "More Borders" option at the bottom of the menu.
5. In the "Format Cells" dialog box, go to the "Border" tab.
6. Choose the circle border style from the "Art" dropdown menu.
7. Adjust the color, width, and dash type for the border.
8. Click "OK" to apply the changes.