The school football field is a rectangle. Its length is 105 meters and its width is 68 meters. What is its perimeter in meters?
学校足球场是一个长方形，它的长是105米，宽是68米，它的周长是多少米？
<gadget id="calculator">105 + 68</gadget>
<output>173</output>

<gadget id="calculator">173 * 2</gadget>
<output>346</output>

<result>346</result>