team bought some new ships. Xiao Ming counted them and found that if all the two front tires of each car were replaced, there would still be 20 tires left; if all four tires of each car were replaced , There are only 6 tires left. Q: How many cars are there in the fleet?
某车队买回了一些新轮船，小明数了一下，发现要是把每辆车的2个前胎全部换掉，还能剩下20个轮胎；如果要把每辆车的4个轮胎全部换掉，就只剩下6个轮胎了．问：车队一共有几辆汽车？
<gadget id="calculator">20 - 6</gadget>
<output>14</output>

<gadget id="calculator">4 - 2</gadget>
<output>2</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<result>7</result>