Cars A and B drive out from two places at the same time. When the distance between the two cars is 35 kilometers, car A travels the whole distance (3/4), and car B travels the whole distance (3/5). How many kilometers are the distance between the two places?
甲乙两车分别从两地同时相对开出，当两车相距35千米的时候，甲车行了全程(3/4)，乙车行了全程的(3/5)．两地相距多少千米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) - 1</gadget>
<output>-2/5 = around -0.4</output>

<gadget id="calculator">(3/4) + (-2/5)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">35 / (7/20)</gadget>
<output>100</output>

<result>100</result>