The Shanghai-Nanjing Expressway (Shanghai to Nanjing) has a total length of 274.08 kilometers. Two cars, A and B, leave Shanghai and Nanjing at the same time. After meeting each other for 1.6 hours, car A travels 80 kilometers per hour, and how much does car B travel per hour? km?
沪宁高速公路(上海到南京)全长274.08千米，甲乙两辆汽车车分别从上海和南京同时相对开出，经过1.6小时相遇，甲车每小时行80千米，乙车每小时行多少千米？
<gadget id="calculator">274.08 / 1.6</gadget>
<output>171.3</output>

<gadget id="calculator">171.3 - 80</gadget>
<output>91.3</output>

<result>91.3</result>