The truck departed from Nanjing and headed for Hangzhou along the expressway. If you travel 90 kilometers per hour, you have been traveling for 2 hours, and you are still 20 kilometers away from the finish line. How many kilometers is the distance from Nanjing to Hangzhou?
卡车从南京出发，沿高速公路开往杭州．如果每小时行90千米，已经行了2小时，此时距终点还有20千米，南京到杭州的距离是多少千米呢？
<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<gadget id="calculator">180 + 20</gadget>
<output>200</output>

<result>200</result>