A train departs from Zhengzhou at 9:00 am and arrives at Shijiazhuang at 1:00 pm. This train travels an average of 103 kilometers per hour. How many kilometers is the railway from Zhengzhou to Shijiazhuang?
一列火车上午9：00从郑州出发，下午1：00到达石家庄．这列火车平均每小时行驶103千米，郑州到石家庄的铁路长多少千米？
<gadget id="calculator">103 * 4</gadget>
<output>412</output>

<result>412</result>