Cars A and B are traveling opposite each other from places A and B respectively. Car B travels 56 kilometers per hour and arrives at the midpoint of places A and B earlier (1/4) hour than car A. When car A reaches the midpoint, car B drives to point C between points A and B. At this time, the ratio of the distance from point B to point A to the total length is 7:18. How many kilometers are there between A and B?
甲、乙两车分别从A、B两地相对而行，乙车每小时行56千米，比甲车早(1/4)小时到A、B两地的中点．当甲车到达中点时，乙车行驶到A、B两地间的C地，这时乙车到A地的路程与全长的比是7：18．A、B两地相距多少千米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">7 / 18</gadget>
<output>7/18 = around 0.388889</output>

<gadget id="calculator">(1/2) - (7/18)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/4) / (1/9)</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">56 * (9/4)</gadget>
<output>126</output>

<result>126</result>