The starting price of a taxi in Taixing City is 6 yuan (within 3 kilometers). For a distance of more than 3 kilometers, the average charge is 2.4 yuan per kilometer. Uncle Li paid a total fare of 15.6 yuan by car from the city hall to the new bus station. How many kilometers away is the city hall from the bus station?
泰兴市出租车起步价为6元(3千米以内)．超过3千米的路程，平均每千米收费2.4元．李叔叔从市政府乘车到新汽车站共付车费15.6元，市政府距离汽车站多少千米？
<gadget id="calculator">15.6 - 6</gadget>
<output>9.6</output>

<gadget id="calculator">9.6 / 2.4</gadget>
<output>4</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<result>7</result>