An avenue is 60 meters long, and a colorful flag is inserted every 4 meters, both ends. Now it is necessary to insert a colorful flag every 6 meters, how many colored flags at both ends can not be moved?
一条大道长60米，每隔4米插一面彩旗，两端都插．现在要改为每隔6米插一面彩旗，连两端共有多少面彩旗可以不移动？
<gadget id="calculator">60 / 12</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<result>6</result>