The total length of the Shanghai-Nanjing Expressway is 274 kilometers. A car drives from Nanjing to Shanghai, and it is 114 kilometers away from Shanghai in 2 hours. How many kilometers per hour does this car travel on average?
沪宁高速公路全长274千米．一辆汽车从南京开往上海，2小时离上海还有114千米．这辆车平均每小时行多少千米？
<gadget id="calculator">274 - 114</gadget>
<output>160</output>

<gadget id="calculator">160 / 2</gadget>
<output>80</output>

<result>80</result>