A train from Xuzhou to Shanghai travels 102 kilometers per hour, which is exactly half of the journey in 5 hours. How many kilometers is it from Xuzhou to Shanghai?
一列火车从徐州开往上海，每小时行102千米，5小时刚好行了全程的一半．从徐州到上海全程有多少千米？
<gadget id="calculator">102 * 5 * 2</gadget>
<output>1_020</output>

<result>1_020</result>