Car A travels from place A to place B at a speed of 90km/hour. Car B and car C drive from place B to place A at the same time at speeds of 80km/hour and 70km/hour respectively. Car A meets car B before driving Meet car C in 15 minutes and ask: How many kilometers is the distance between A and B?
A车从甲地向乙地行驶，速度90km/小时，B车和C车同时从乙地向甲地行驶，速度分别为80km/小时和70km/小时，A车与B车相遇后，再行驶15分钟与C车相遇，问：甲地和乙地相距多少km？
<gadget id="calculator">90 + 80</gadget>
<output>170</output>

<gadget id="calculator">90 + 70</gadget>
<output>160</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">160 * (1/4)</gadget>
<output>40</output>

<gadget id="calculator">170 - 160</gadget>
<output>10</output>

<gadget id="calculator">40 / 10</gadget>
<output>4</output>

<gadget id="calculator">170 * 4</gadget>
<output>680</output>

<result>680</result>