car travels 64 kilometers in 2 hours, from point A to point B 160 kilometers, with the same speed, how many hours will it take to go back and forth? (Solve with ratio)
一辆汽车2小时行64千米，从甲地到乙地160千米，用同样的速度行驶，往返需要多少小时？(用比例解)
<gadget id="calculator">160 * 2</gadget>
<output>320</output>

<gadget id="calculator">64 / 2</gadget>
<output>32</output>

<gadget id="calculator">320 / 32</gadget>
<output>10</output>

<result>10</result>