The distance between A and B is 280 kilometers. A car drives from A to B, and it is planned to arrive in 3.5 hours. Due to weather changes, the actual hourly driving was 30 kilometers less than planned. How many hours does it actually take to arrive?
甲乙两地相距280千米，一辆汽车从甲地开往乙地，计划3.5小时到达．因天气变化，实际每小时比计划少行驶30千米．实际多少小时才能到达？
<gadget id="calculator">280 / 3.5</gadget>
<output>80</output>

<gadget id="calculator">80 - 30</gadget>
<output>50</output>

<gadget id="calculator">280 / 50</gadget>
<output>28/5 = around 5.6</output>

<result>28/5 = around 5.6</result>