Two ships, A and B, sailed from the two ports of A and B to the opposite port at the same time. After 6 hours, the two ships met. How many hours did it take to reach Port A? (solution in various ways)
A、B两船，分别从甲、乙两港同时向对方港口开出，经过6小时后，两船相遇，相遇后两船继续向前行驶，A船又经4小时到达乙港，B船又经几小时到达甲港？(用多种方法解)
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) * 6 * 6</gadget>
<output>6</output>

<gadget id="calculator">(1/6) * 4 * 6</gadget>
<output>4</output>

<gadget id="calculator">4 - 6 - 4</gadget>
<output>-6</output>

<gadget id="calculator">6 + 6 + (-6)</gadget>
<output>6</output>

<gadget id="calculator">(1/6) * 6</gadget>
<output>1</output>

<gadget id="calculator">(1/6) * 4</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) - 1</gadget>
<output>-1/3 = around -0.333333</output>

<gadget id="calculator">1 + (-1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">6 / (2/3)</gadget>
<output>9</output>

<result>9</result>