How to make Excel cells square

Excel is a spreadsheet application in which the page is laid out as rows and columns. Each row and column have a default height and width. The default width of the column is greater than the height of the row so each cell is rectangular. You may want to make each cell square instead of rectangular. For example, you may want to draw a graph without using data and the charting tools of Excel. For this, you need a grid of squares instead of rectangles. The problem is that the scale used to define the column width is not the same as the scale used for the row height so you cannot just change the column width and the row height to the same number.  Here we will see how to make each cell square.