The charging standard of a taxi in a certain city is: 8 yuan for less than 5 kilometers (including 5 kilometers), 1.5 yuan for each additional kilometer for more than 5 kilometers. Mom needs to travel 12 kilometers from home to the department store. Please How much fare should you pay for your mother?
某市出租车的收费标准为：5千米以下(含5千米)8元，5千米以上，每增加1千米收费1.5元，妈妈从家到百货商场共需行12千米，请你帮妈妈算一下，应付多少车费？
<gadget id="calculator">12 - 5</gadget>
<output>7</output>

<gadget id="calculator">7 * 1.5</gadget>
<output>10.5</output>

<gadget id="calculator">8 + 10.5</gadget>
<output>18.5</output>

<result>18.5</result>