In order to protect a thousand-year-old tree in the park, the Garden Institute decided to build a circular protective fence for it. If 10 intervals are arranged, each interval is 1.2 meters long, how long is the length of this protective fence?
为了保护公园一棵千年古树，园林所决定为它做一圈圆形的防护栏，如果安排10个间隔，每个间隔长1.2米，这个防护栏的一周的长度是多少米？
<gadget id="calculator">10 * 1.2</gadget>
<output>12</output>

<result>12</result>