The starting price of a taxi in a certain city is 6 yuan (1 kilometer is charged as 3 kilometers less than 1 kilometer). If the distance exceeds 3 kilometers, the excess part will be charged at 1.8 yuan per kilometer. Mom takes a taxi from Yinhai Commercial Building, The total fare is 18.60 yuan. Do you know how far it is from home to Yinhai Commercial Building?
某市出租车起步价为6元(3千米不足1千米按1千米收费)超过3千米，则超的部分按每千米1.8元收费，妈妈乘出租车从到银海商厦，共付车费18.60元，你知道从家到银海商厦有多远？
<gadget id="calculator">18.6 - 6</gadget>
<output>12.6</output>

<gadget id="calculator">12.6 / 1.8</gadget>
<output>7</output>

<gadget id="calculator">7 + 3</gadget>
<output>10</output>

<result>10</result>