The perimeter of a rectangle is 38 cm, the width is 8 cm, what is the length in cm
一个长方形的周长是38厘米，宽是8厘米，长是多少厘米
<gadget id="calculator">38 / 2</gadget>
<output>19</output>

<gadget id="calculator">19 - 8</gadget>
<output>11</output>

<result>11</result>