Finding the double of 400

To find the double of 400, you start by taking the given number represented by 400. Doubling means you want to find a number twice as big, so the natural operation to perform is multiplication by 2. This is why the calculation involves multiplying 400 by 2. The expression (400 * 2) captures this operation mathematically. When you multiply 400 by 2, the product you get, denoted as 800, is exactly double the original number. For example, if 400 were 7, then 800 would be (7 * 2), which is 14. This logic applies universally to any real number represented by 400, making 800 the doubled value of 400.