Two trains depart from two places 798 kilometers apart at the same time. After 4.2 hours, the two trains meet. Car A travels 86.7 kilometers per hour. How many kilometers per hour does train B travel?
两列火车从相距798千米的两地同时相对开出，经过4.2小时两车相遇，甲车每小时行86.7千米，乙车每小时行多少千米？
<gadget id="calculator">798 / 4.2</gadget>
<output>190</output>

<gadget id="calculator">190 - 86.7</gadget>
<output>103.3</output>

<result>103.3</result>