A rope is 36 decimeters long, and it can wrap around the table exactly twice. What is the circumference of the table in decimeters?
一条绳子长36分米，绕着桌子的四周正好可以围两圈，桌子的周长是多少分米．
<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<result>18</result>