Two cars drive towards each other from A and B at the same time, and meet each other after 4 hours. It is known that A travels 50 kilometers per hour, and B travels 60 kilometers per hour. How many hours will it take for A to complete the journey?
两车从A、B两地同时开车相向而行，4小时后相遇，已知甲每小时行50千米，乙每时行60千米．求甲行完全程还需要多少小时？
<gadget id="calculator">4 / 50</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">60 * (2/25)</gadget>
<output>24/5 = around 4.8</output>

<result>24/5 = around 4.8</result>