There are 51 small flags planted on the side of the straight runway, and their intervals are 2 meters. Now it is necessary to change to only 26 small flags, how many meters should the interval be changed?
笔直的跑道一旁插着51面小旗，它们的间隔是2米．现在要改为只插26面小旗，间隔应改为多少米？
<gadget id="calculator">51 - 1</gadget>
<output>50</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">26 - 1</gadget>
<output>25</output>

<gadget id="calculator">100 / 25</gadget>
<output>4</output>

<result>4</result>