On one side of the straight runway, there are 46 colorful flags with an interval of 2 meters. Now it is necessary to insert 31 colored flags instead, and the positions of the colored flags at both ends remain unchanged. How many meters is the interval at this time?
在笔直的跑道一边插着46面彩旗，间隔为2米．现在要改为插31面彩旗，两端彩旗位置不变，这时间隔是多少米？
<gadget id="calculator">46 - 1</gadget>
<output>45</output>

<gadget id="calculator">31 - 1</gadget>
<output>30</output>

<gadget id="calculator">2 / 30</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">45 * (1/15)</gadget>
<output>3</output>

<result>3</result>