train travels from A to B. If it travels 80 kilometers per hour, it takes 10 hours to reach it. If it speeds up by 20 kilometers per hour, how many hours does it take to reach it?
一列火车从甲地开往乙地，若每小时行80千米，10小可以到达，若每小时提速20千米，多少小时可以到达？
<gadget id="calculator">80 + 20</gadget>
<output>100</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">80 * (1/10)</gadget>
<output>8</output>

<result>8</result>