One train from Shanghai to Guangzhou travels 85 kilometers per hour; another slow train travels from Guangzhou to Shanghai at the same time and travels 60 kilometers per hour. Then, 1 hour before the two trains meet, how many kilometers is the distance between the express train and the slow train?
从上海开往广州一列车，每小时行85千米；另一列慢车同时从广州开往上海，每小时行60千米．那么，两列火车相遇前的1小时，快车与慢车之间的路程是多少千米．
<gadget id="calculator">85 + 60</gadget>
<output>145</output>

<gadget id="calculator">145 * 1</gadget>
<output>145</output>

<result>145</result>