The corridor of the classroom is 18 meters long. If there are potted flowers every 3 meters along one side (and both ends), how many potted flowers will be needed?
教室的走廊长18米，如果沿一侧每隔3米放一盆花(两端也要放)，需要多少盆花？
<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<result>7</result>