Two trains depart opposite from each other at the same time. Car A travels 98 kilometers per hour, and train B travels 102 kilometers per hour. After 2.1 hours, the two trains meet. How many kilometers is the distance between the two places? (calculated in two ways)
两列火车从两地同时相对开出，甲车每小时行98千米，乙车每小时行102千米，经过2.1小时两车相遇．两地距离多少千米？(用两种方法计算)
<gadget id="calculator">98 * 2.1</gadget>
<output>205.8</output>

<gadget id="calculator">102 * 2.1</gadget>
<output>214.2</output>

<gadget id="calculator">205.8 + 214.2</gadget>
<output>420</output>

<result>420</result>