It takes 20 hours for car A to drive from point A to point B, and it takes 35 hours for car B to drive from point B to point A. The two cars are traveling towards each other from both places at the same time. When they meet, car B travels 180 kilometers less than car A. How many kilometers away are the places?
甲车从A地开往B地需20小时，乙车从B地开往A地要35小时，两车同时从两地相向而行，相遇时乙车比甲车少行180千米，两地相距多少千米？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 35</gadget>
<output>1/35 = around 0.028571</output>

<gadget id="calculator">(1/20) - (1/35)</gadget>
<output>3/140 = around 0.021429</output>

<gadget id="calculator">(1/20) + (1/35)</gadget>
<output>11/140 = around 0.078571</output>

<gadget id="calculator">1 / (11/140)</gadget>
<output>140/11 = around 12.727273</output>

<gadget id="calculator">(3/140) * (140/11)</gadget>
<output>3/11 = around 0.272727</output>

<gadget id="calculator">180 / (3/11)</gadget>
<output>660</output>

<result>660</result>