Cars A and B are traveling towards each other from places A and B. They will meet at point C, which is 270 kilometers away from point A. If the speed of car B increases by 20%, the two cars will meet at point D, which is 30 kilometers away from point C. ． In fact, car A returns due to an accident after driving for a while, and the two cars still meet at point D. How much is the whole journey between AB and AB?
甲、乙两车从A、B两地相向而行，将在距A地270千米的C地相遇，如果乙车速度提高20%，则两车在距C地30千米的D地相遇．实际甲车在行驶一段后因事返回，两车仍在D点相遇，问AB两地全程是多少？
<gadget id="calculator">9 - 8</gadget>
<output>1</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / (1/5)</gadget>
<output>5</output>

<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">270 / (3/8)</gadget>
<output>720</output>

<result>720</result>