Taxi charges in this city: the starting price is 7 yuan (that is, the fare is 7 yuan if the driving distance does not exceed 3 kilometers), and 2.4 yuan will be charged for each additional 1 kilometer after more than 3 kilometers. Xiao Ming paid a total of 19 yuan by taxi from home to grandma's house, so how far is Xiao Ming's house from Grandma Li's house?
本市出租车的收费标准：起步价7元(即行驶距离不超过3千米都需要付7元车费)，超过3千米后，每增加1千米，加收2.4元．小明乘出租车从家到奶奶家共付车费19元，那么小明家李奶奶家多远？
<gadget id="calculator">19 - 7</gadget>
<output>12</output>

<gadget id="calculator">12 / 2.4</gadget>
<output>5</output>

<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<result>8</result>