The starting price of a taxi in a certain city is 6 yuan (within 3 kilometers), and the fare is 2.5 yuan per kilometer for more than 3 kilometers. Dongdong will pay a total of 16.5 yuan for the taxi from home to school. How far is the distance from home to school? ?
某市出租车的起步价为6元(3千米以内)，超过3千米的，每千米收费2.5元，东东从家去学校，共付车费16.5元，家离学校有多远？
<gadget id="calculator">16.5 - 6</gadget>
<output>10.5</output>

<gadget id="calculator">10.5 / 2.5</gadget>
<output>4.2</output>

<gadget id="calculator">4.2 + 3</gadget>
<output>7.2</output>

<result>7.2</result>