Why a Billion Is Not Always the Same: Short Scale vs. Long Scale
How the Same Name Can Represent Very Different Numbers When you read about a country's national debt or the distance to a distant star, you often see numbers like "trillion" or "quadrillion." Most people assume these terms have a fixed meaning. But in reality, the value of a "billion" or a "trillion" depends on which number scale you use. The two main systems are the short scale and the long scale, and the differences between number scales can cause confusion in internation