Red flags are planted around the four corners of a square field, and a total of 28 flags are inserted. May I ask: How many red flags are there on each side?
在一块正方形场地的四周插红旗，四个角上都插一面，一共插了28面．请问：每边插了多少面红旗？
<gadget id="calculator">28 + 4</gadget>
<output>32</output>

<gadget id="calculator">32 / 4</gadget>
<output>8</output>

<result>8</result>