Cars A and B drive from places A and B respectively. When they meet, car A travels 70% of the entire journey, and car B is 160 kilometers away from the midpoint. How many kilometers are there between places A and B?
甲、乙两车分别从A、B两地相对开出，相遇时甲车行驶全程的70%，乙车离中点还有160千米，A、B两地相距多少千米．
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(7/10) - (1/2)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">160 / (1/5)</gadget>
<output>800</output>

<result>800</result>