Obviously take a taxi to go to my aunt's house 9.5 kilometers away. The taxi fare is: 8 yuan within 3 kilometers, 3.5 yuan per kilometer for more than 3 kilometers and less than 10 kilometers, and 20 kilometers for more than 10 kilometers. The following is 4 yuan per kilometer. How much money do you need to bring at least to pay the fare?
明明坐出租车去9.5千米远的姑妈家，坐出租车的计费方法是：3千米以内8元，3千米以上10千米以下每千米3.5元，10千米以上20千米以下每千米4元．明明至少要带多少钱才能够付车费？
<gadget id="calculator">9.5 - 3</gadget>
<output>6.5</output>

<gadget id="calculator">6.5 * 3.5</gadget>
<output>22.75</output>

<gadget id="calculator">8 + 22.75</gadget>
<output>30.75</output>

<result>30.75</result>