The starting price of a taxi in a certain city is 5 yuan (within 3 kilometers). More than 3 kilometers, with an average of 1.5 yuan per kilometer. The three members of Xiaoming's family took a car to his grandmother's house and paid a total of 8.9 yuan. How far is Xiaoming's house from his grandmother's house?
某市出租车起步价为5元(3千米以内)．超过3千米，平均每千米1.5元，小明一家三口乘车到外婆家，共付车费8.9元，问小明家离外婆家有多远？
<gadget id="calculator">8.9 - 5</gadget>
<output>3.9</output>

<gadget id="calculator">3.9 / 1.5</gadget>
<output>2.6</output>

<gadget id="calculator">2.6 + 3</gadget>
<output>5.6</output>

<result>5.6</result>