Two trains, A and B, depart from a railway station in opposite directions at the same time. A travels 98 kilometers per hour, and B travels 105 kilometers per hour. After 3 hours, how many kilometers are there between the two trains?
甲、乙两列火车同时从一个火车站向相反的方向开出，甲每小时行98千米，乙每小时行105千米，经过3小时，两车相距多少千米？
<gadget id="calculator">98 + 105</gadget>
<output>203</output>

<gadget id="calculator">203 * 3</gadget>
<output>609</output>

<result>609</result>