A train travels from A to B at a speed of 120 km/h. It will be 250 km away from B 13 hours after departure. How many kilometers are there between A and B?
一列火车从甲地开往乙地，速度是120千米/小时，出发13小时后离乙地还有250千米，甲乙两地相距多少千米？
<gadget id="calculator">120 * 13</gadget>
<output>1_560</output>

<gadget id="calculator">1_560 + 250</gadget>
<output>1_810</output>

<result>1_810</result>