Taxi fares are as follows: the starting price within 3 kilometers is 6 yuan, the part exceeding 3 kilometers is charged at 1.5 yuan per kilometer, and an additional fuel fee of 1 yuan is charged each time. Xiaohong shares 25 yuan, and the taxi distance is How many kilometers?
出租车收费标准是：3千米以内起步价6元，超过3千米的部分按1.5元每千米收费，另外每次加收燃油费1元，小红共用25元，则打的路程是多少千米？
<gadget id="calculator">25 - 6 - 1</gadget>
<output>18</output>

<gadget id="calculator">18 / 1.5</gadget>
<output>12</output>

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<result>15</result>