Multiplying columns in Excel is a very simple process. First, select the cells that you would like to multiply. Next, use the "*" symbol to multiply the cells. Finally, press "Enter" to complete the process.

For example, if you would like to multiply the cells in column A by the cells in column B, select the cells in both columns and use the "*" symbol. Then, press "Enter" to complete the process. The cells in both columns will now contain the product of the cells in each column.