Two trains depart from two places 399 kilometers apart at the same time, and they meet after 2.1 hours. Car A travels 98 kilometers per hour, how many kilometers per hour does Car B travel?
两列火车从相距399千米的两地同时相对开出，经过2.1小时两车相遇．甲车每小时行98千米，乙车每小时行多少千米？
<gadget id="calculator">399 / 2.1</gadget>
<output>190</output>

<gadget id="calculator">190 - 98</gadget>
<output>92</output>

<result>92</result>