According to the regulations of Chongqing Municipality: the starting fare for taking a taxi is 5 yuan (within 3 kilometers), and the fare is 1.8 yuan for every 1 kilometer beyond 3 kilometers, plus 3 yuan for fuel at the checkout. After paying 26 yuan, how many kilometers did she travel by taxi?
重庆市规定：乘坐出租车起步价为5元(3千米以内)，超过3千米以外每1千米按1.8元计费，结账时外加3元钱的燃油费，李老师乘坐出租车共付了26元钱，她乘出租车一共行了多少千米？
<gadget id="calculator">26 - 3 - 5</gadget>
<output>18</output>

<gadget id="calculator">18 / 1.8</gadget>
<output>10</output>

<gadget id="calculator">10 + 3</gadget>
<output>13</output>

<result>13</result>