What is the length of a rectangle with a circumference of 34 cm and a width of 10 cm?
一个周长34厘米的长方形，宽10厘米，它的长是多少厘米？
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">34 - 20</gadget>
<output>14</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<result>7</result>