Two trains depart from A and B stations at the same time and run towards each other. A train travels 68 kilometers per hour, and B trains travel 76 kilometers per hour. After traveling for (5/9) hours, the two trains are still separated by the whole distance ( 3/4), find the length of the railway between A and B two stations in kilometers.
两列火车从甲、乙两站同时出发，相向而行，甲车每小时行68千米，乙车每小时行76千米，行了(5/9)小时后两车还相距全程的(3/4)，求甲乙两站之间的铁路长多少千米．
<gadget id="calculator">68 + 76</gadget>
<output>144</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(5/9) / (1/4)</gadget>
<output>20/9 = around 2.222222</output>

<gadget id="calculator">144 * (20/9)</gadget>
<output>320</output>

<result>320</result>