Calculating five times the number 45

To calculate five times the number 45, you use multiplication, specifically multiplying 45 by 5. Multiplication here means you are taking the value of 45 and combining it five times, which scales the number up proportionally. Think of it as adding 45 five separate times: 45 + 45 + 45 + 45 + 45. Performing the operation 45 * 5 accomplishes this in a single step. The expression 225 captures this calculation, so when you substitute any value for 45, evaluating 45 * 5 will give you five times that original number.