A rectangle has a perimeter of 34 cm and a width of 8 cm. What is the length of this rectangle in centimeters? (column equation)
一个长方形的周长是34厘米，宽是8厘米．这个长方形的长是多少厘米？(列方程)
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">34 - 16</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>9</result>