The total length of the sports field is 96 meters. In the past, one red flag was inserted every 4 meters from one end to the other. Now it is changed to be inserted every 6 meters. How many red flags can be left unplugged?
运动场全长96米，原来从一端到另一端每隔4米插1面红旗，现在要改为每隔6米插1面红旗，那么可以不拔出来的红旗共有多少面？
<gadget id="calculator">96 / 12</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<result>9</result>