Mr. Li paid a total of 23 yuan for the taxi from home to the train station. The taxi fare is as follows: ①The starting price is 5 yuan (within 5 kilometers) ②Exceeding 5 kilometers, an additional 1.20 yuan will be charged for each kilometer. How many kilometers is it from Mr. Li's home to the train station?
李老师乘坐出租车从家到火车站共付车费23元，出租车的收费标准是：①起步价5元(五千米以内)②超过五千米，每千米加收1.20元．李老师从家到火车站有多少千米？
<gadget id="calculator">23 - 5</gadget>
<output>18</output>

<gadget id="calculator">18 / 1.2</gadget>
<output>15</output>

<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<result>20</result>