convoy transported a batch of disaster relief supplies. It was originally planned to drive 40 kilometers per hour and arrive in 5 hours. The actual driving is 10 kilometers more per hour than the original plan. How many hours will it take to complete the journey?
某车队运送一批救灾物资，原计划每小时行驶40千米，5小时到达．实际每小时比原计划多行驶10千米，行完全程需要几小时？
<gadget id="calculator">40 * 5</gadget>
<output>200</output>

<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">200 / 50</gadget>
<output>4</output>

<result>4</result>