Calculating quadruple 15

To calculate the quadruple of 15, you start by recognizing that quadrupling means multiplying by 4. The placeholder 15 represents any numeric value you choose. By multiplying 15 by 4, you effectively increase its value four times. For instance, if 15 represents 3, then multiplying 3 by 4 gives 12; this result, 12, is the quadruple of 3. Therefore, the formula (15 * 4) generalizes this process for any input, allowing you to find 60 by performing this simple multiplication step.