To multiply multiple cells in Excel, there are several methods you can use. Here are some of the most common methods:

1. Using the asterisk (*) operator: To make the simplest multiplication formula in Excel, type the equals sign (=) in a cell, then type the first number you want to multiply, followed by the asterisk symbol (*), and then type the second number you want to multiply. Press Enter to get the result.

2. Using the PRODUCT function: If you need to multiply multiple cells or ranges, the fastest method would be using the PRODUCT function. To use this function, type "=PRODUCT(number1, number2, ...)" in a cell, where number1, number2, etc. are the numbers, cells, or ranges that you want to multiply. For example, to multiply values in cells A2, B2, and C2, use this formula: "=PRODUCT(A2:C2)".

3. Using the AutoFill feature: You can also use the AutoFill feature to multiply an entire column or row of data. To do this, type the multiplication formula in the first cell of the column or row you want to multiply, and then select the cell and click the AutoFill button in the Home tab of the Ribbon. Excel will automatically fill in the formula for the rest of the column or row.

Its important to remember the order of operations (PEMDAS) when using multiplication in Excel. Parentheses, exponentiation, multiplication or division (whichever comes first), and addition or subtraction (whichever comes first) should be calculated in that order.

Overall, multiplying cells in Excel is easy and straightforward, and there are several methods you can use to get the job done.