In physical education class, students form a circle to play games. The circumference of this circle is 21.98 meters. The teacher stands at the center point. What is the distance between each student and the teacher?
体育课上同学们围成一个圆圈做游戏，这个圆圈的周长是21.98米，老师站在中心点上，每个同学与老师间的距离是多少米．
<gadget id="calculator">21.98 / 3.14 / 2</gadget>
<output>3.5</output>

<result>3.5</result>