On the side of a straight runway, a small flag is inserted every 5 meters, both ends are inserted, and a total of 25 flags are inserted. How many meters is this straight runway?
在一条直跑道一旁，每隔5米插一面小旗，两端都插，一共插了25面，这条直跑道长多少米．
<gadget id="calculator">25 - 1</gadget>
<output>24</output>

<gadget id="calculator">24 * 5</gadget>
<output>120</output>

<result>120</result>