1. The operating software used this time is word software under office series products, and the version used is 20 16, which is suitable for families and students.

2. Open the word document first, then insert a table with three rows and three columns in the word document, and input the simulation data for demonstration.

3. Then move the mouse to the cell under the total amount and click, and then find the layout menu in the menu bar. Under the layout menu of the toolbar, we can find an option-formula.

4. Click this formula option, and in the formula editing window that pops up, we can enter the formula "=PRODUCT(LEFT)", which means to calculate the product of all parameters on the left.

5. Then we select the next cell and insert the formula again according to the above method. It should be noted that the parameters after this function need to indicate the calculation direction. When the values of the parameters involved in the calculation change, we need to click the formula again to calculate, and hot modification is not supported.