A corridor is 28 meters long, and a potted flower is placed every 4 meters, both ends should be placed, how many potted flowers should be placed in total.
一条走廊长28米，每隔4米放一盆花，两端都要放，一共要放多少盆花．
<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<result>8</result>