The taxi fare in a certain area is as follows: the starting fare is 5 yuan within 2.5 kilometers, and the fare beyond 2.5 kilometers is 2.3 yuan per kilometer. Uncle Xiao Wang spent a total of 25.7 yuan in the car. Do you know how many kilometers he traveled by car?
某地区出租车收费标准如下：起步价为2.5千米内5元，超过2.5千米的部分每千米收费2.3元．小王叔叔坐车一共花去车费25.7元，你知道他坐车行了多少千米吗？
<gadget id="calculator">25.7 - 5</gadget>
<output>20.7</output>

<gadget id="calculator">20.7 / 2.3</gadget>
<output>9</output>

<gadget id="calculator">9 + 2.5</gadget>
<output>11.5</output>

<result>11.5</result>