Taxi fare standard in a certain city: 7 yuan within 3km, and 2.4 yuan for every additional 1km over 3km (less than 1km is calculated as 1km). Now someone takes a taxi from place A to place B and pays 14.2 yuan for the fare. How many kilometers is the maximum distance from place A to place B?
某市的出租车收费标准：3km以内7元，超过3km，则每增加1km加价2.4元(不足1km按1km计价)．现在某人乘出租车从甲地到乙地，支付车费14.2元，问从甲地到乙地的路程最多是多少千米？
<gadget id="calculator">14.2 - 7</gadget>
<output>7.2</output>

<gadget id="calculator">7.2 / 2.4</gadget>
<output>3</output>

<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<result>6</result>