The taxi fare in Luzhou is: the starting price is 7 yuan, and the charge is 2 yuan per kilometer after 3 kilometers. Xiaoyu took a taxi from Southwest Trade City to Dashanping and paid 11 yuan. How many kilometers is it from Southwest Trade City to Dashanping?
泸州出租车的收费标准是：起步价7元，3千米后每千米增收2元．小玉从西南商贸城乘出租车到大山坪，付出了11元．从西南商贸城到大山坪大约有多少千米？
<gadget id="calculator">11 - 7</gadget>
<output>4</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<result>5</result>