To get the square of a number in Excel, you must use this formula: =<cell coordinates of first cell>^2. In short, if you have a digit in an A1 cell and you want to find the square of that number ...

Input your first value in the desired cell; for example, input "3" into "D1." Double-click an empty cell adjacent to the first. For this example, use "D2" as the cell to place the result.