The total length of the Shanghai-Nanjing Expressway is 274 kilometers. The truck departs from Nanning and travels along the Shanghai-Nanjing Expressway to Shanghai. It has traveled 90 kilometers per hour. It has been traveling for 2 hours. How many kilometers is the truck from Shanghai?
沪宁高速公路全长274千米，卡车从南宁出发，沿沪宁高速公路开往上海，每小时行90千米，已经行了2小时，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>