On one side of a small road, a colorful flag is hung every 5 meters from the beginning to the end. There are 12 flags in total. How long is this small road in meters?
在一条小路的一侧，从头到尾每隔5米挂一面彩旗，一共挂了12面，这条小路长多少米．
<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">5 * 11</gadget>
<output>55</output>

<result>55</result>