The starting price of a taxi of a certain brand (3 kilometers and within 3 kilometers) is 6 yuan, and the price is 1.5 yuan per kilometer for more than 3 kilometers and within 7 kilometers; the price for each kilometer above 7 kilometers is 50% more. Passengers take a taxi from Xi'an Railway Station to the "Shaanxi Provincial History Museum", which is about 8 kilometers away. How much should they pay when they arrive?
某品牌出租车起步(3公里及3公里以内)价是6元，超过3公里而在7公里以内每公里按1.5元计价；7公里以上部分每公里再加价50%．旅客从西安火车站乘出租车到距离约8公里的"陕西省历史博物馆"，到达时应付多少车费？
<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">4 * 1.5</gadget>
<output>6</output>

<gadget id="calculator">8 - 7</gadget>
<output>1</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 * 1.5 * (3/2)</gadget>
<output>2.25</output>

<gadget id="calculator">6 + 6 + 2.25</gadget>
<output>14.25</output>

<result>14.25</result>