The perimeter of a rectangle is 36 cm, its width is 8 cm, what is its length in cm?
一个长方形的周长是36厘米，它的宽是8厘米，长是多少厘米？
<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">18 - 8</gadget>
<output>10</output>

<result>10</result>