Two ships, A and B, departed from two ports 418 kilometers apart at the same time. Ship A sailed 36 kilometers per hour, and ship B sailed 34 kilometers per hour. Mission, return to the original port, and immediately set sail and continue to sail relative to the second ship. After how many hours, the two ships meet.
甲、乙两艘舰，又相距418千米的两个港口同时相对开出，甲舰每小时航行36千米，乙舰每小时航行34千米，开出1小时后，甲舰因有紧急任务，返回原港，又立即起航与乙舰继续相对开出，经过多少小时两舰相遇．
<gadget id="calculator">34 * 2</gadget>
<output>68</output>

<gadget id="calculator">418 - 68</gadget>
<output>350</output>

<gadget id="calculator">36 + 34</gadget>
<output>70</output>

<gadget id="calculator">350 / 70</gadget>
<output>5</output>

<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<result>7</result>