It is 320 kilometers from city A to city B, and a car travels 240 kilometers in 3 hours. According to this calculation, how many hours will it take to reach city B?
从A城到B城有320千米，一辆汽车3小时行驶240千米，照这样计算，再用多少小时能到达B城？
<gadget id="calculator">320 - 240</gadget>
<output>80</output>

<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">80 / 80</gadget>
<output>1</output>

<result>1</result>