The speed of my country's railway transportation has been increased six times, and the speed of the train has increased from the original 80 kilometers per hour to the current 200 kilometers per hour. How many hours can the original 5-hour journey of the train be completed in advance?
我国铁路运输通过六次提速，火车的速度由原来的每小时80千米提高到现在的每小时200千米，火车原来5小时的路程，现在可提前几小时行完？
<gadget id="calculator">5 * 80</gadget>
<output>400</output>

<gadget id="calculator">400 / 200</gadget>
<output>2</output>

<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<result>3</result>