A train leaves the station at 7:00 p.m. and arrives at its destination at 4:00 a.m. the next day. The train travels 200 kilometers per hour. How many kilometers does the train travel?
一列火车晚上7时从车站开出，第二天凌晨4时达目的地，火车每小时行驶200千米，这列火车行驶了多少千米？
<gadget id="calculator">12 - 7</gadget>
<output>5</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">200 * 9</gadget>
<output>1_800</output>

<result>1_800</result>