The charging method of taxis in the county is: within three kilometers (including three kilometers), only the starting price is 5 yuan. There is an additional charge of 2 yuan per kilometer for the part just over three kilometers. Xiaoling pays 25 yuan for the fare from the Youth Activity Center. Do you know how far Xiaoling's home is from the Youth Activity Center?
县城出租车的收费方式是：三公里内(含三公里)只收起步价5元．三公里以上刚超过的部分每公里再收费2元．小玲从交到少年活动中心付车费25元．你知道小玲家离少年活动中心有多远吗？
<gadget id="calculator">25 - 5</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 3</gadget>
<output>13</output>

<result>13</result>