Calculating double of 15 effectively

Doubling a number involves adding that number to itself, which is equivalently expressed by multiplying the number by 2. Here, 15 represents the initial number we want to double. When we multiply 15 by 2, we are essentially calculating two times the original amount. To perform this calculation step by step, first recognize 15 as the baseline value. Then, multiply 15 by 2, which gives the amount that is twice the size of the original number. The expression (15 * 2) captures this operation in a concise mathematical form. The final value 30 is the doubled value obtained directly from this multiplication.