The starting price of taxis in Nanjing is 8 yuan (within 3 kilometers), and the average fare is 2 yuan and 40 cents per kilometer for more than 3 kilometers. Wang Jun paid 22 yuan and 40 cents for the bus from his home to the Zhongyangmen shopping mall. How far is Wang Jun's home from Zhongyangmen Mall?
南京市出租车的起步价为8元(3千米以内)，超过3千米，平均每千米收费2元4角．王军从家去中央门商场付车费22元4角．王军家离中央门商场有多远？
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">22 + (2/5)</gadget>
<output>112/5 = around 22.4</output>

<gadget id="calculator">(112/5) - 8</gadget>
<output>72/5 = around 14.4</output>

<gadget id="calculator">2 + (2/5)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">(72/5) / (12/5)</gadget>
<output>6</output>

<gadget id="calculator">6 + 3</gadget>
<output>9</output>

<result>9</result>