Calculating five times the number 80

To calculate five times the number 80, you use multiplication, specifically multiplying 80 by 5. Multiplication here means you are taking the value of 80 and combining it five times, which scales the number up proportionally. Think of it as adding 80 five separate times: 80 + 80 + 80 + 80 + 80. Performing the operation 80 * 5 accomplishes this in a single step. The expression 400 captures this calculation, so when you substitute any value for 80, evaluating 80 * 5 will give you five times that original number.