The distance from Shanghai to Beijing is about 1,200 kilometers. It takes only 4.8 hours to travel from Shanghai to Beijing by high-speed rail. The average speed of the express train from Shanghai to Beijing is only 100 km/h. How many times is the speed of the high-speed rail faster than the express train?
上海到北京大约有1200千米的路程，乘高铁从上海去北京只要4.8小时，从上海到北京的快速火车的平均速度只有100千米/时，求高铁的速度是快速火车的几倍？
<gadget id="calculator">1_200 / 4.8 / 100</gadget>
<output>2.5</output>

<result>2.5</result>