A train travels 240 kilometers in 3 hours. According to this calculation, how many kilometers will it travel in 7 hours?
一列火车3小时行240千米，照这样算，7小时行多少千米．
<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">80 * 7</gadget>
<output>560</output>

<result>560</result>