The distance between A and B is 180 kilometers. A car travels from A to B and plans to arrive there in 4 hours. The actual time is 5 kilometers longer than the original plan. How many hours will it take to arrive? (two ways to answer)
甲、乙两地相距180千米，一辆汽车从甲地开往乙地，计划4小时到达，实际每小时比原计划多行5千米，这样只要用几小时就能到达？(两种方法解答)
<gadget id="calculator">180 / 4</gadget>
<output>45</output>

<gadget id="calculator">45 + 5</gadget>
<output>50</output>

<gadget id="calculator">180 / 50</gadget>
<output>18/5 = around 3.6</output>

<result>18/5 = around 3.6</result>