An express train travels 640 kilometers in 4 hours, and a car travels 80 kilometers per hour. How many times faster can an express train travel than a car?
特快列车4小时行驶640千米，一辆汽车每小时行驶80千米．特快列车行驶的速度是汽车行驶速度的几倍？
<gadget id="calculator">640 / 4 / 80</gadget>
<output>2</output>

<result>2</result>