Calculating five times the number 4

To calculate five times the number 4, you use multiplication, specifically multiplying 4 by 5. Multiplication here means you are taking the value of 4 and combining it five times, which scales the number up proportionally. Think of it as adding 4 five separate times: 4 + 4 + 4 + 4 + 4. Performing the operation 4 * 5 accomplishes this in a single step. The expression 20 captures this calculation, so when you substitute any value for 4, evaluating 4 * 5 will give you five times that original number.