The total length of the Shanghai-Nanjing Expressway is 274 kilometers. A car driving from Nanjing to Shanghai will be 34 kilometers away from Shanghai after driving for 3 hours. How many kilometers does this car travel on average per hour?
沪宁高速公路全长274千米，一辆汽车从南京开往上海，行驶3小时后离上海还有34千米，这辆汽车平均每小时行多少千米？
<gadget id="calculator">274 - 34</gadget>
<output>240</output>

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

<result>80</result>