##Introduction
Imagine cruising on a highway and seeing a speed limit sign that reads 120 km h to miles. If you grew up with miles per hour, the number feels foreign, and you instinctively want to know how fast that really is in familiar units. Converting 120 kilometers per hour into miles per hour is a practical skill for travelers, drivers, and anyone dealing with international speed limits Most people skip this — try not to. Turns out it matters..
