On a 15-meter-long road, start from the beginning and place potted flowers every 3 meters. How many potted flowers are placed in total?
在一条15米长的路上，从头开始每隔3米摆一盆花，一共摆了多少盆花？
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<result>6</result>