How to insert cell content to the shape
To insert the cell content to your shape, do the following:
1. Select the shape or text box.
2. In the formula bar, type the equal ("=") symbol.
3. Click the spreadsheet cell that contains the data or text you want to insert into the selected shape or text box.
You can also type the reference to the spreadsheet cell. Include the sheet name, for example:
4. Press Enter.
See also this tip in French: Comment insérer le contenu de la cellule à la forme.