The distance between A and B is 630 km. A car is driving from place A to place B, and it is planned to arrive in 9 hours. Due to the weather, the actual trip is 7 kilometers less than the plan per hour. How many hours will it take to reach point B?
甲、乙两地相距630千米．一辆汽车从甲地开往乙地，计划9小时到达．因天气原因，实际每小时比计划少行7千米，实际多少小时才能到达乙地？
<gadget id="calculator">630 / 9</gadget>
<output>70</output>

<gadget id="calculator">70 - 7</gadget>
<output>63</output>

<gadget id="calculator">630 / 63</gadget>
<output>10</output>

<result>10</result>