A ship travels from port A to port B. The distance between port A and port B is 120 kilometers, the speed of the ship is 24 kilometers per hour, and the speed of returning along the original road is 20 kilometers per hour. How many hours will it take to return than to go?
一艘轮船从甲港到乙港，甲乙两港距离是120千米，轮船速度是24千米每小时，沿原路返回时的速度是20千米每小时，返回比去时多用几小时？
<gadget id="calculator">120 / 20</gadget>
<output>6</output>

<gadget id="calculator">120 / 24</gadget>
<output>5</output>

<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<result>1</result>