Dad took Xiaoping to take a taxi home from the bookstore. The distance from the bookstore to his home was 9.8 kilometers. The taxi fare standard is: 5 yuan within 3 kilometers (including 3 kilometers), and 2.5 yuan per kilometer for more than 3 kilometers (less than 1 kilometer is calculated as 1 kilometer). How much should Dad pay the taxi driver when he gets home?
爸爸带小平乘坐出租车从书店回家，书店到他家的距离是9.8千米．出租车收费标准为：3千米(含3千米)以内收费5元，超过3千米的，每千米收费2.5元(不足1千米按1千米计算)．到家后爸爸应付多少钱给出租车司机？
<gadget id="calculator">2.5 * 7</gadget>
<output>17.5</output>

<gadget id="calculator">17.5 + 5</gadget>
<output>22.5</output>

<result>22.5</result>