An airport runway is 5 kilometers long. How many meters is this?

Step 1 ：First, we know that 1 kilometer is equal to 1000 meters. We can write this as a conversion factor: \(1 km = 1000 m\).

Step 2 ：Second, we can set up the conversion from kilometers to meters: \(5 km * \frac{1000 m}{1 km}\).

Step 3 ：Third, we can simplify the conversion by canceling out the kilometers (km) units: \(5 * 1000 m = 5000 m\).