The starting price of a certain taxi (within 3 kilometers) is 6 yuan, and the price is 1.2 yuan per kilometer for more than 3 kilometers and within 7 kilometers; the price for each kilometer above 7 kilometers is 50% more. Teacher Chen took a taxi from Yingcai School to Gulei PX Chemical Plant, which is about 17 kilometers away. Try to calculate how much the taxi fare should be when he arrives?
某出租车起步价(3公里内)是6元，超过3公里而在7公里以内每公里按1.2元计价；7公里以上部分每公里再加价50%．陈老师从英才学校乘出租车到距离约17公里的古雷PX化工厂，试计算到达时应付车费多少元？
<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">4 * 1.2</gadget>
<output>4.8</output>

<gadget id="calculator">17 - 7</gadget>
<output>10</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">10 * 1.2 * (3/2)</gadget>
<output>18</output>

<gadget id="calculator">6 + 4.8 + 18</gadget>
<output>28.8</output>

<result>28.8</result>