convoy transported a batch of relief supplies. It was planned to travel 40 kilometers per hour and arrive in 5 hours. The actual trip was 50 kilometers per hour. How many hours would it take to complete the journey?
某车队运送一批救灾物资人，原计划每小时行驶40千米，5小时到达，实际每小时行50千米，行完全程需要几小时？
<gadget id="calculator">5 / 50</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">40 * (1/10)</gadget>
<output>4</output>

<result>4</result>