Uncle Wang took a train from a certain city to Beijing. The train traveled 125 kilometers per hour. After 12 hours, there was still 280 kilometers to Beijing. How many kilometers is the city from Beijing?
王叔叔从某城市乘火车到北京，火车每小时行125千米，行了12小时，还有280千米到北京．该城市到北京有多少千米？
<gadget id="calculator">125 * 12</gadget>
<output>1_500</output>

<gadget id="calculator">1_500 + 280</gadget>
<output>1_780</output>

<result>1_780</result>