The total length of the Shanghai-Nanjing Expressway is 274 kilometers. The truck departed from Nanjing and drove along the Shanghai-Nanjing Expressway to Shanghai. It has been driving for 2 hours, with an average speed of 90 kilometers per hour. Q: How many kilometers is the truck from Shanghai?
沪宁高速公路全长274千米，卡车从南京出发，沿沪宁高速公路开往上海，已经开了2小时，平均每小时行90千米．问：卡车离上海还有多少千米？
<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<gadget id="calculator">274 - 180</gadget>
<output>94</output>

<result>94</result>