If the perimeter of a rectangle is 16 meters and the length is 6 meters, what is the width in meters?
一长方形周长为16米，长为6米，那么宽为多少米．
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 - 6</gadget>
<output>2</output>

<result>2</result>